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BenchLM
Data

Claude Opus 5 vs Claude Sonnet 5

Updated October 20, 2026. Rank says Claude Opus 5 is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.

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Decision reading

Claude Opus 5 has the higher public score, 80.07 versus 64.89, and the 90% score intervals do not overlap. 24 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.

Model A
Anthropic logo

Anthropic

80.07/100

Supported · Public rank #8

90% interval 77.2–82.9

Model B
Anthropic logo

Anthropic

64.89/100

Supported · Public rank #37

90% interval 60.0–69.8

Shared results
24
Claude Opus 5 only
56
Claude Sonnet 5 only
6
Like-for-like categories
3 / 8
Supported: Claude Opus 5 and Claude Sonnet 5How the comparison works

Which one for your work

Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.

  • Coding work

    Code generation, repair, and software-engineering tasks

    Claude Opus 5

    Claude Opus 5 has the higher public coding point estimate, 70.8 to 57.5, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

    Confidence: limited
  • Agentic work

    Tool use, computer use, and multi-step task completion

    Claude Opus 5

    Claude Opus 5 has the higher public agentic point estimate, 78.4 to 66.3, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

    Confidence: limited
  • Chat turn cost

    1K fresh input + 500 output tokens

    Claude Sonnet 5

    Claude Sonnet 5 has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
Show secondary and unsupported calls
  • Cache-heavy agent loop cost

    200K cached + 20K fresh input + 10K output tokens

    Claude Sonnet 5

    Claude Sonnet 5 has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
  • Repository review cost

    50K fresh input + 3K output tokens

    Claude Sonnet 5

    Claude Sonnet 5 has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
  • Long documents

    Prompts that approach the documented context limit

    No clear pick

    The documented context windows are equal.

    Confidence: documented

Which one for a specific job

Choose a job from the LLM Selector's task catalog to see the category row it rests on, under the same basis rules as the table below. A directional row stays directional; choosing a job never creates a winner.

The same task catalog as the LLM Selector. Each job names the evidence surface it rests on; nothing here adds a new score.

70.8Claude Opus 557.5Claude Sonnet 5

Like-for-like · BenchAlign v5.8

Claude Opus 5 has the higher coding point estimate. Conditional score ranges do not establish rank confidence.

Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.

Same basis rules as the category table below

What is actually comparable

Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.

1 category rests on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.

Shape of the matched evidence

Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.

Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.

Bars run 0–100 on each benchmark’s normalized display scale

Category results, on a stated basis

Each row shows the public-lane category score for both models: the BenchAlign v5.8 lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.

Agentic

Like-for-like
Claude Opus 5
78.4
Supported · #4/132
Claude Sonnet 5
66.3
Supported · #15/132
Basis
BenchAlign v5.8 lane · 21 vs 8 public rows
Reading
Claude Opus 5 leads

Coding

Like-for-like
Claude Opus 5
70.8
Supported · #9/153
Claude Sonnet 5
57.5
Supported · #26/153
Basis
BenchAlign v5.8 lane · 18 vs 11 public rows
Reading
Claude Opus 5 leads · intervals overlap

Knowledge

Like-for-like
Claude Opus 5
82.3
Supported · #7/187
Claude Sonnet 5
65.4
Supported · #34/187
Basis
BenchAlign v5.8 lane · 19 vs 6 public rows
Reading
Claude Opus 5 leads · intervals overlap

Multimodal

Directional only
Claude Opus 5
92.2
#2/55
Claude Sonnet 5
82.0
#15/55
Basis
Provisional lane · 1 vs 1 weighted rows
Reading
Directional only

Reasoning

Not comparable
Claude Opus 5
81.0
#8/27
Claude Sonnet 5
81.3
Unranked · 2 rankable rows
Basis
Provisional lane · 2 vs 0 weighted rows
Reading
Not comparable

Multilingual

Not comparable
Claude Opus 5
Not ranked
Claude Sonnet 5
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Instruction following

Not comparable
Claude Opus 5
Not ranked
Claude Sonnet 5
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Math

Not comparable
Claude Opus 5
91.6
Unranked · 7 rankable rows
Claude Sonnet 5
69.4
Unranked · 2 rankable rows
Basis
Provisional lane · 2 vs 2 weighted rows
Reading
Not comparable

Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign v5.8) differ from the provisional-lane categories. Unranked scores sit on the provisional lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.

Supported evidence per lane · bars run 0–100Methodology

What each workload costs

Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.

Chat turn

1K fresh input + 500 output tokens

Claude Opus 5
$0.0175
Fits in one request
Claude Sonnet 5
$0.007
Fits in one request

Claude Sonnet 5 has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

Claude Opus 5
$0.325
Fits in one request
Claude Sonnet 5
$0.13
Fits in one request

Claude Sonnet 5 has the lower modeled cost

Costs use the listed standard API rates.

Cache-heavy agent loop

200K cached + 20K fresh input + 10K output tokens

Claude Opus 5
$0.45
Fits in one request
Claude Sonnet 5
$0.18
Fits in one request

Claude Sonnet 5 has the lower modeled cost

Costs use the listed standard API rates.

Cached input falls back to the list input rate only where a cached rate is unpublished

Specification differences

Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.

Cached-input rate

A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.

Claude Opus 5

$0.5 per 1M cached input tokens

Claude API pricing

Claude Sonnet 5

$0.2 per 1M cached input tokens

Claude API pricing

Reasoning profile

Claude Opus 5

Reasoning

Claude Sonnet 5

Reasoning

Weight access

Claude Opus 5

Proprietary

Claude Sonnet 5

Proprietary

License

Claude Opus 5

Proprietary

Claude Sonnet 5

Proprietary

Release date

Claude Opus 5

2026-07-24

Claude Sonnet 5

2026-06-30

If you already use one of these models

Deployment change
Both entries list Anthropic as the provider. Confirm endpoint, model ID, limits, and feature support before switching.
Quality signal
Claude Opus 5 has the higher public score, 80.07 versus 64.89, and the 90% score intervals do not overlap.
Workload cost
Repository review: $0.325 vs $0.13. Cache-heavy agent loop: $0.45 vs $0.18.
Context tradeoff
Both models list 1M.
Run the same representative tasks against both endpoints before changing production traffic.

Questions

Which is better, Claude Opus 5 or Claude Sonnet 5?

Claude Opus 5 has the higher public score, 80.07 versus 64.89, and the 90% score intervals do not overlap. That is the clearest overall quality signal in the current public data.

Which is better for coding, Claude Opus 5 or Claude Sonnet 5?

Claude Opus 5 has the higher public coding point estimate, 70.8 to 57.5, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

Which is better for agentic tasks, Claude Opus 5 or Claude Sonnet 5?

Claude Opus 5 has the higher public agentic tasks point estimate, 78.4 to 66.3, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

Which costs less, Claude Opus 5 or Claude Sonnet 5?

For the stated presets, chat costs $0.0175 on Claude Opus 5 and $0.007 on Claude Sonnet 5; repository review costs $0.325 and $0.13; the cache-heavy agent loop costs $0.45 and $0.18. Costs use the listed standard API rates.

Which has the larger context window, Claude Opus 5 or Claude Sonnet 5?

Both models list the same context window, 1M.

Benchmark evidence

The full public result ledger is available for audit without forcing a wide desktop table onto a phone.

Browse raw public benchmark evidence86 rows

Agentic

  • Terminal-Bench 3.0

    Shared source
    Claude Opus 542.7%
    Claude Sonnet 514.6%

    Claude Opus 5 leads this result

  • BrowseComp

    Claude Opus 590.8%
    Source
    Claude Sonnet 584.7%
    Source

    Claude Opus 5 leads this result

  • HLE w/ tools

    Claude Opus 564.7%
    Source
    Claude Sonnet 557.4%
    Source

    Claude Opus 5 leads this result

  • DeepSearchQA

    Claude Opus 595.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • DRACO

    Claude Opus 588.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • BrowseComp (10-agent, prerelease)

    Claude Opus 593.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • OSWorld 2.0

    Claude Opus 570.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • MCP Atlas

    Claude Opus 585.8%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • MCP-Atlas claim coverage

    Claude Opus 589.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • LAB all-pass (Anthropic harness)

    Claude Opus 523.58%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • LAB criterion-pass (Anthropic harness)

    Claude Opus 593.74%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • LAB all-pass (Harvey held-out)

    Claude Opus 511.7%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • LAB criterion-pass (Harvey held-out)

    Claude Opus 594.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Toolathlon-Verified

    Claude Opus 580.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Toolathlon Verified Pass@3

    Claude Opus 587.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Toolathlon Verified Pass³

    Claude Opus 573.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Toolathlon Verified avg. turns

    Claude Opus 523.5 turns
    Source
    Claude Sonnet 5—

    Not directly comparable

  • AutomationBench

    Claude Opus 526.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Terminal-Bench 2.1 (Vals)

    Claude Opus 584.6%
    Source
    Claude Sonnet 574.5%
    Source

    Claude Opus 5 leads this result

  • ApprenticeBench

    Shared source
    Claude Opus 536%
    Claude Sonnet 516%

    Claude Opus 5 leads this result

  • MazeBench

    Claude Opus 512%
    Source
    Claude Sonnet 50%
    Source

    Claude Opus 5 leads this result

  • Terminal-Bench 2.1

    Claude Opus 5—
    Claude Sonnet 580.4%
    Source

    Not directly comparable

  • OSWorld-Verified

    Claude Opus 5—
    Claude Sonnet 581.2%
    Source

    Not directly comparable

Coding

  • Bug Hunt Bench

    Claude Opus 527.0 fixes
    Source
    Claude Sonnet 5—

    Not directly comparable

  • SWE-bench Verified

    Claude Opus 596%
    Source
    Claude Sonnet 585.2%
    Source

    Claude Opus 5 leads this result

  • SWE-bench Pro

    Claude Opus 579.2%
    Source
    Claude Sonnet 563.2%
    Source

    Claude Opus 5 leads this result

  • SWE Multilingual

    Claude Opus 589.5%
    Source
    Claude Sonnet 578.3%
    Source

    Claude Opus 5 leads this result

  • SWE Multimodal

    Claude Opus 559.4%
    Source
    Claude Sonnet 528.1%
    Source

    Claude Opus 5 leads this result

  • DeepSWE

    Claude Opus 568.8%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • FrontierCode 1.1 Main

    Claude Opus 553.4%
    Source
    Claude Sonnet 542.7%
    Source

    Claude Opus 5 leads this result

  • FrontierCode 1.1 Extended

    Claude Opus 563.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • FrontierSWE v2

    Claude Opus 552.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ProgramBench (episode 1)

    Claude Opus 583.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ProgramBench

    Claude Opus 593.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • CursorBench 3.2

    Shared source
    Claude Opus 570.0%
    Claude Sonnet 561.5%

    Claude Opus 5 leads this result

  • VulcanBench v3

    Claude Opus 587.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • VulcanBench CII v1

    Shared source
    Claude Opus 596.4%
    Claude Sonnet 589.2%

    Claude Opus 5 leads this result

  • LiveCodeBench (Vals)

    Claude Opus 589.0%
    Source
    Claude Sonnet 582.4%
    Source

    Claude Opus 5 leads this result

  • SWE-bench (Vals)

    Claude Opus 597.0%
    Source
    Claude Sonnet 579.6%
    Source

    Claude Opus 5 leads this result

  • CursorBench 4.0

    Shared source
    Claude Opus 546.6%
    Claude Sonnet 534.1%

    Claude Opus 5 leads this result

  • PostTrainBench v1.1

    Claude Opus 535.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Terminal-Bench 2.1

    Claude Opus 5—
    Claude Sonnet 580.4%
    Source

    Not directly comparable

Reasoning

  • ARC-AGI-1

    Claude Opus 597.50%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ARC-AGI-2

    Claude Opus 590.4%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ARC-AGI-3

    Claude Opus 530.2%
    Source
    Claude Sonnet 5—

    Not directly comparable

Multimodal

  • Chartography (no tools)

    Claude Opus 529.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Chartography (tools)

    Claude Opus 583.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • BenchCAD Vision2Code (no tools)

    Claude Opus 50.366
    Source
    Claude Sonnet 5—

    Not directly comparable

  • BenchCAD Vision2Code (tools)

    Claude Opus 50.821
    Source
    Claude Sonnet 5—

    Not directly comparable

  • GDP.pdf (no tools)

    Claude Opus 583.4%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • GDP.pdf (tools)

    Claude Opus 585.5%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • OfficeQA

    Claude Opus 578.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • OfficeQA Pro

    Claude Opus 566.9%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ParseBench

    Claude Opus 5—
    Claude Sonnet 562.13%
    Source

    Not directly comparable

  • CharXiv

    Claude Opus 5—
    Claude Sonnet 588.3%
    Source

    Not directly comparable

  • CharXiv w/o tools

    Claude Opus 5—
    Claude Sonnet 577%
    Source

    Not directly comparable

Knowledge

  • HLE

    Claude Opus 564.7%
    Source
    Claude Sonnet 557.4%
    Source

    Claude Opus 5 leads this result

  • HLE w/o tools

    Claude Opus 556.3%
    Source
    Claude Sonnet 543.2%
    Source

    Claude Opus 5 leads this result

  • HLE-Verified

    Shared source
    Claude Opus 554.4%
    Claude Sonnet 531.0%

    Claude Opus 5 leads this result

  • Claude Opus 584.2%
    Claude Sonnet 580.1%

    Claude Opus 5 leads this result

  • HealthBench (raw)

    Claude Opus 567.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • HealthBench (length-adjusted)

    Claude Opus 557.8%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • HealthBench Professional

    Claude Opus 559.8%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • HealthBench Professional (raw)

    Claude Opus 573.4%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • BioMysteryBench (human-solvable)

    Claude Opus 590.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • BioMysteryBench (human-difficult)

    Claude Opus 549.4%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • SpatialBench Verified

    Claude Opus 572.5%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • SingleCellBench

    Claude Opus 560.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ProteinGym Hard

    Claude Opus 547.7%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Protein Design

    Claude Opus 542.5%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Organic chemistry V2

    Claude Opus 561.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Protocols (troubleshooting)

    Claude Opus 561.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • Protocols (understanding)

    Claude Opus 578.4%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • GPQA Diamond (Vals)

    Claude Opus 593.4%
    Source
    Claude Sonnet 588.9%
    Source

    Claude Opus 5 leads this result

  • MMLU-Pro (Vals)

    Claude Opus 591.6%
    Source
    Claude Sonnet 587.5%
    Source

    Claude Opus 5 leads this result

Multilingual

  • GMMLU

    Claude Opus 592.5%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • MILU

    Claude Opus 592.1%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • INCLUDE

    Claude Opus 589.8%
    Source
    Claude Sonnet 5—

    Not directly comparable

Instruction following

  • Gray Swan IPI (15 attempts)

    Claude Opus 54.6%
    Source
    Claude Sonnet 5—

    Not directly comparable

Math

  • IMO 2026

    Claude Opus 542/42
    Source
    Claude Sonnet 5—

    Not directly comparable

  • RiemannBench (no tools)

    Claude Opus 560.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • RiemannBench (tools)

    Claude Opus 579.0%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ArXivMath Jun. 2026 (no tools)

    Claude Opus 590.8%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • ArXivMath Jun. 2026 (tools)

    Claude Opus 591.3%
    Source
    Claude Sonnet 5—

    Not directly comparable

  • FrontierMath v2 (Tiers 1-3)

    Shared source
    Claude Opus 585.614%
    Claude Sonnet 565.614%

    Claude Opus 5 leads this result

  • FrontierMath v2 (Tier 4)

    Shared source
    Claude Opus 573.171%
    Claude Sonnet 529.268%

    Claude Opus 5 leads this result

86 public results · 24 shared

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Last updated October 20, 2026