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BenchLM
Data

Claude Sonnet 4.6 vs Gemini 3 Flash

Updated October 17, 2026. Rank says Claude Sonnet 4.6 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 Sonnet 4.6 has the higher public score estimate, 55.89 versus 54.28, but the 90% score intervals overlap. Treat that as a lead, not a settled winner. 9 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

55.89/100

Supported · Public rank #64

90% interval 43.6–68.2

Model B
Google logo

Google

54.28/100

Supported · Public rank #70

90% interval 39.1–69.5

Shared results
9
Claude Sonnet 4.6 only
19
Gemini 3 Flash only
2
Like-for-like categories
3 / 8
Supported: Claude Sonnet 4.6 and Gemini 3 FlashHow 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 Sonnet 4.6

    Claude Sonnet 4.6 has the higher public coding point estimate, 44.7 to 32.1, 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 Sonnet 4.6

    Claude Sonnet 4.6 has the higher public agentic point estimate, 46.3 to 32.4, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

    Confidence: limited
  • Long documents

    Prompts that approach the documented context limit

    Gemini 3 Flash

    Gemini 3 Flash has the larger documented context window.

    Confidence: documented
Show secondary and unsupported calls
  • Chat turn cost

    1K fresh input + 500 output tokens

    Gemini 3 Flash

    Gemini 3 Flash 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

    Gemini 3 Flash

    Gemini 3 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
  • Cache-heavy agent loop cost

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

    Not enough matched evidence

    The page does not recommend a cost winner because at least one model cannot fit the stated workload in one request. Claude Sonnet 4.6 does not fit this workload in one request. Claude Sonnet 4.6 has no published cached-input rate, so cached tokens use its listed input rate.

    Confidence: rate-fallback

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.

44.7Claude Sonnet 4.632.1Gemini 3 Flash

Like-for-like · BenchAlign v5.8

Claude Sonnet 4.6 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 Sonnet 4.6
46.3
Supported · #55/128
Gemini 3 Flash
32.4
Supported · #88/128
Basis
BenchAlign v5.8 lane · 10 vs 4 public rows
Reading
Claude Sonnet 4.6 leads · intervals overlap

Coding

Like-for-like
Claude Sonnet 4.6
44.7
Supported · #54/150
Gemini 3 Flash
32.1
Supported · #88/150
Basis
BenchAlign v5.8 lane · 9 vs 3 public rows
Reading
Claude Sonnet 4.6 leads · intervals overlap

Knowledge

Like-for-like
Claude Sonnet 4.6
55.4
Supported · #58/184
Gemini 3 Flash
55.7
Supported · #55/184
Basis
BenchAlign v5.8 lane · 6 vs 2 public rows
Reading
Practical tie

Instruction following

Directional only
Claude Sonnet 4.6
48.0
#99/148
Gemini 3 Flash
66.1
#76/148
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Directional only

Reasoning

Not comparable
Claude Sonnet 4.6
62.8
Unranked · 4 rankable rows
Gemini 3 Flash
63.8
Unranked · 2 rankable rows
Basis
Provisional lane · 1 vs 0 weighted rows
Reading
Not comparable

Multimodal

Not comparable
Claude Sonnet 4.6
58.7
#45/54
Gemini 3 Flash
80.3
Unranked · 1 rankable row
Basis
Provisional lane · 1 vs 0 weighted rows
Reading
Not comparable

Multilingual

Not comparable
Claude Sonnet 4.6
Not ranked
Gemini 3 Flash
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Math

Not comparable
Claude Sonnet 4.6
Not ranked
Gemini 3 Flash
57.4
Unranked · 2 rankable rows
Basis
Provisional lane · 0 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 Sonnet 4.6
$0.0105
Fits in one request
Gemini 3 Flash
$0.002
Fits in one request

Gemini 3 Flash has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

Claude Sonnet 4.6
$0.195
Fits in one request
Gemini 3 Flash
$0.034
Fits in one request

Gemini 3 Flash 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 Sonnet 4.6
$0.81
Does not fit in one request
Cached input priced at the published list-input rate
Gemini 3 Flash
$0.05
Fits in one request

Claude Sonnet 4.6 does not fit this workload in one request. Claude Sonnet 4.6 has no published cached-input rate, so cached tokens use its listed input rate.

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.

Context window

Maximum documented context; output-token limits may be lower.

Claude Sonnet 4.6

200K

Cached-input rate

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

Claude Sonnet 4.6

Not published

Gemini 3 Flash

$0.05 per 1M cached input tokens

Google Gemini API pricing

Documented inputs

Claude Sonnet 4.6

Not sourced

Gemini 3 Flash

Not sourced

Documented outputs

Claude Sonnet 4.6

Not sourced

Gemini 3 Flash

Not sourced

Provider availability

Claude Sonnet 4.6

Not sourced

Gemini 3 Flash

Not sourced

Reasoning profile

Claude Sonnet 4.6

Non-Reasoning

Gemini 3 Flash

Non-Reasoning

Weight access

Claude Sonnet 4.6

Proprietary

Gemini 3 Flash

Proprietary

License

Claude Sonnet 4.6

Proprietary

Gemini 3 Flash

Proprietary

Release date

Claude Sonnet 4.6

2026-02-01

Gemini 3 Flash

2025-12-01

If you already use one of these models

Deployment change
The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
Quality signal
Claude Sonnet 4.6 has the higher public score estimate, 55.89 versus 54.28, but the 90% score intervals overlap.
Workload cost
Repository review: $0.195 vs $0.034. Cache-heavy agent loop: $0.81 vs $0.05.
Context tradeoff
Gemini 3 Flash has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.

Questions

Which is better, Claude Sonnet 4.6 or Gemini 3 Flash?

Claude Sonnet 4.6 has the higher public score estimate, 55.89 versus 54.28, but the 90% score intervals overlap. The higher estimate is not a decisive winner because the uncertainty ranges overlap.

Which is better for coding, Claude Sonnet 4.6 or Gemini 3 Flash?

Claude Sonnet 4.6 has the higher public coding point estimate, 44.7 to 32.1, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

Which is better for agentic tasks, Claude Sonnet 4.6 or Gemini 3 Flash?

Claude Sonnet 4.6 has the higher public agentic tasks point estimate, 46.3 to 32.4, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

Which costs less, Claude Sonnet 4.6 or Gemini 3 Flash?

For the stated presets, chat costs $0.0105 on Claude Sonnet 4.6 and $0.002 on Gemini 3 Flash; repository review costs $0.195 and $0.034; the cache-heavy agent loop costs $0.81 and $0.05. Claude Sonnet 4.6 does not fit this workload in one request. Claude Sonnet 4.6 has no published cached-input rate, so cached tokens use its listed input rate.

Which has the larger context window, Claude Sonnet 4.6 or Gemini 3 Flash?

Gemini 3 Flash has the larger documented context window: 1M, compared with 200K.

Benchmark evidence

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

Browse raw public benchmark evidence30 rows

Agentic

  • Terminal-Bench 2.0

    Claude Sonnet 4.659.1%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • OSWorld-Verified

    Claude Sonnet 4.672.1%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • Claude Sonnet 4.667.8%
    Gemini 3 Flash49.2%

    Claude Sonnet 4.6 leads this result

  • CyberGym

    Claude Sonnet 4.665.2%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • Claude Sonnet 4.662.92%
    Gemini 3 Flash56.63%

    Claude Sonnet 4.6 leads this result

  • OSWorld 2.0

    Claude Sonnet 4.68.3%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • Claude Sonnet 4.636.9%
    Gemini 3 Flash11.4%

    Claude Sonnet 4.6 leads this result

  • Terminal-Bench 2.1 (Vals)

    Claude Sonnet 4.657.3%
    Source
    Gemini 3 Flash53.9%
    Source

    Claude Sonnet 4.6 leads this result

  • ApprenticeBench

    Claude Sonnet 4.62%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • MazeBench

    Claude Sonnet 4.60%
    Source
    Gemini 3 Flash—

    Not directly comparable

Coding

  • SWE-bench Verified

    Claude Sonnet 4.679.6%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • SWE-Rebench

    Claude Sonnet 4.660.7%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • React Native Evals

    Claude Sonnet 4.680.6%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • Terminal-Bench 2.0

    Claude Sonnet 4.659.1%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • Vibe Code Bench

    Shared source
    Claude Sonnet 4.651.48%
    Gemini 3 Flash20.20%

    Claude Sonnet 4.6 leads this result

  • cursorBench31

    Claude Sonnet 4.648.8%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • FrontierCode 1.1 Main

    Claude Sonnet 4.624.3%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • LiveCodeBench (Vals)

    Claude Sonnet 4.682.1%
    Source
    Gemini 3 Flash85.6%
    Source

    Gemini 3 Flash leads this result

  • SWE-bench (Vals)

    Claude Sonnet 4.677.4%
    Source
    Gemini 3 Flash75.0%
    Source

    Claude Sonnet 4.6 leads this result

Reasoning

  • ARC-AGI-2

    Claude Sonnet 4.658.3%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • ARC-AGI-1

    Claude Sonnet 4.686.00%
    Source
    Gemini 3 Flash—

    Not directly comparable

Multimodal

  • CharXiv

    Claude Sonnet 4.677.4%
    Source
    Gemini 3 Flash—

    Not directly comparable

Knowledge

  • GPQA

    Claude Sonnet 4.689.9%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • SuperGPQA

    Claude Sonnet 4.695%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • MMLU-Pro

    Claude Sonnet 4.679.2%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • HLE

    Claude Sonnet 4.649%
    Source
    Gemini 3 Flash—

    Not directly comparable

  • GPQA Diamond (Vals)

    Claude Sonnet 4.685.6%
    Source
    Gemini 3 Flash87.9%
    Source

    Gemini 3 Flash leads this result

  • MMLU-Pro (Vals)

    Claude Sonnet 4.687.3%
    Source
    Gemini 3 Flash88.6%
    Source

    Gemini 3 Flash leads this result

Math

  • FrontierMath v2 (Tiers 1-3)

    Claude Sonnet 4.6—
    Gemini 3 Flash51.228%
    Source

    Not directly comparable

  • FrontierMath v2 (Tier 4)

    Claude Sonnet 4.6—
    Gemini 3 Flash17.073%
    Source

    Not directly comparable

30 public results · 9 shared

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Last updated October 17, 2026