Coding
Directional only- Claude Opus 4.5
- 56.6
- Estimated · #36/151
- o3-mini
- 45.3
- Estimated · #88/151
- Basis
- BenchAlign lane · 5 vs 1 public rows
- Reading
- Directional only
Claude Opus 4.5 vs o3-mini
Updated September 10, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
Decision reading
Claude Opus 4.5 has the higher public score estimate, 58.41 versus 46.83, but the 90% score intervals overlap. Treat that as a lead, not a settled winner.
3 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
Share or export
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.
Chat turn cost
1K fresh input + 500 output tokens
o3-mini
o3-mini 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
Repository review cost
50K fresh input + 3K output tokens
o3-mini
o3-mini has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Claude Opus 4.5 and o3-mini are scored on Estimated evidence for coding, so the reading is directional rather than like-for-like.
Confidence: limited
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
O3-mini is not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limited
Long documents
Prompts that approach the documented context limit
No clear pick
The documented context windows are equal.
Confidence: documented
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 Opus 4.5 does not fit this workload in one request. o3-mini does not fit this workload in one request. Claude Opus 4.5 has no published cached-input rate, so cached tokens use its listed input rate. o3-mini has no published cached-input rate, so cached tokens use its listed input rate.
Confidence: rate-fallback
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
42 Claude Opus 4.5 only
3 Shared
2 o3-mini only
- Shared results
- 3
- Claude Opus 4.5 only
- 42
- o3-mini only
- 2
- Like-for-like categories
- 0 / 8
2 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign 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.
Knowledge
Directional only- Claude Opus 4.5
- 53.9
- Estimated · #61/183
- o3-mini
- 39.7
- Supported · #134/183
- Basis
- BenchAlign lane · 6 vs 2 public rows
- Reading
- Directional only
Agentic
Not comparable- Claude Opus 4.5
- 43.2
- Estimated · #97/152
- o3-mini
- Not ranked
- Basis
- BenchAlign lane · 15 vs 0 public rows
- Reading
- Not comparable
Reasoning
Not comparable- Claude Opus 4.5
- 72.1
- Unranked · 4 rankable rows
- o3-mini
- Not ranked
- Basis
- Provisional lane · 1 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Claude Opus 4.5
- 58.3
- #6/7
- o3-mini
- Not ranked
- Basis
- Provisional lane · 4 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Claude Opus 4.5
- 82.9
- #2/12
- o3-mini
- Not ranked
- Basis
- Provisional lane · 1 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Claude Opus 4.5
- 23.5
- #46/48
- o3-mini
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Claude Opus 4.5
- 39.5
- #105/123
- o3-mini
- Not ranked
- Basis
- Provisional lane · 1 vs 0 weighted rows
- Reading
- Not comparable
| Category | Claude Opus 4.5 | o3-mini | Basis | Reading |
|---|---|---|---|---|
| Coding | 56.6Estimated · #36/151 | 45.3Estimated · #88/151 | Directional onlyBenchAlign lane · 5 vs 1 public rows | Directional only |
| Knowledge | 53.9Estimated · #61/183 | 39.7Supported · #134/183 | Directional onlyBenchAlign lane · 6 vs 2 public rows | Directional only |
| Agentic | 43.2Estimated · #97/152 | Not ranked | Not comparableBenchAlign lane · 15 vs 0 public rows | Not comparable |
| Reasoning | 72.1Unranked · 4 rankable rows | Not ranked | Not comparableProvisional lane · 1 vs 0 weighted rows | Not comparable |
| Math | 58.3#6/7 | Not ranked | Not comparableProvisional lane · 4 vs 0 weighted rows | Not comparable |
| Multilingual | 82.9#2/12 | Not ranked | Not comparableProvisional lane · 1 vs 0 weighted rows | Not comparable |
| Multimodal | 23.5#46/48 | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Instruction following | 39.5#105/123 | Not ranked | Not comparableProvisional lane · 1 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign) differ from the provisional-lane categories. Unranked scores sit on the lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
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.
SWE-bench Verified
Coding
GPQA
Knowledge
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 4.5
- $0.0175
- Fits in one request
- o3-mini
- $0.0033
- Fits in one request
o3-mini has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Claude Opus 4.5
- $0.325
- Fits in one request
- o3-mini
- $0.0682
- Fits in one request
o3-mini 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 4.5
- $1.35
- Does not fit in one request
- Cached input priced at the published list-input rate
- o3-mini
- $0.286
- Does not fit in one request
- Cached input priced at the published list-input rate
Claude Opus 4.5 does not fit this workload in one request. o3-mini does not fit this workload in one request. Claude Opus 4.5 has no published cached-input rate, so cached tokens use its listed input rate. o3-mini has no published cached-input rate, so cached tokens use its listed input rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationClaude Opus 4.5o3-mini
Context window
Maximum documented context; output-token limits may be lower.
Claude Opus 4.5
200K
o3-mini
200K
API model ID
Claude Opus 4.5
Not sourced
o3-mini
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Claude Opus 4.5
Not published
o3-mini
Not published
Documented inputs
Claude Opus 4.5
Not sourced
o3-mini
Not sourced
Documented outputs
Claude Opus 4.5
Not sourced
o3-mini
Not sourced
Provider availability
Claude Opus 4.5
Not sourced
o3-mini
Not sourced
Reasoning profile
Claude Opus 4.5
Non-Reasoning
o3-mini
Reasoning
Weight access
Claude Opus 4.5
Proprietary
o3-mini
Proprietary
License
Claude Opus 4.5
Proprietary
o3-mini
Proprietary
Release date
Claude Opus 4.5
2025-11-01
o3-mini
2025-01-31
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 Opus 4.5 has the higher public score estimate, 58.41 versus 46.83, but the 90% score intervals overlap.
- Workload cost
- Repository review: $0.325 vs $0.0682. Cache-heavy agent loop: $1.35 vs $0.286.
- Context tradeoff
- Both models list 200K.
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence47 rows
Agentic
Terminal-Bench 2.0
Claude Opus 4.559.3%Sourceo3-mini—Not directly comparable
OSWorld-Verified
Claude Opus 4.566.3%Sourceo3-mini—Not directly comparable
OSWorld
Claude Opus 4.566.3%Sourceo3-mini—Not directly comparable
Claw-Eval
Claude Opus 4.559.6%Sourceo3-mini—Not directly comparable
QwenClawBench
Claude Opus 4.552.3%Sourceo3-mini—Not directly comparable
τ³-bench results
Claude Opus 4.570.2%Sourceo3-mini—Not directly comparable
VITA-Bench
Claude Opus 4.523.3%Sourceo3-mini—Not directly comparable
DeepPlanning
Claude Opus 4.526.4%Sourceo3-mini—Not directly comparable
Toolathlon
Claude Opus 4.543.5%Sourceo3-mini—Not directly comparable
MCP Atlas
Claude Opus 4.542.3%Sourceo3-mini—Not directly comparable
MCP-Tasks
Claude Opus 4.571.8%Sourceo3-mini—Not directly comparable
WideResearch
Claude Opus 4.576.4%Sourceo3-mini—Not directly comparable
CyberGym
Claude Opus 4.550.6%Sourceo3-mini—Not directly comparable
Gert Labs
Claude Opus 4.564.23%Sourceo3-mini—Not directly comparable
JobBench
Claude Opus 4.532.3%Sourceo3-mini—Not directly comparable
Coding
SWE-bench Verified
Claude Opus 4.580.9%Sourceo3-mini49.3%SourceClaude Opus 4.5 leads this result
LiveCodeBench v6
Claude Opus 4.584.8%Sourceo3-mini—Not directly comparable
SWE-bench Pro
Claude Opus 4.557.1%Sourceo3-mini—Not directly comparable
SWE Multilingual
Claude Opus 4.577.5%Sourceo3-mini—Not directly comparable
NL2Repo
Claude Opus 4.543.2%Sourceo3-mini—Not directly comparable
Reasoning
Knowledge
GPQA
Claude Opus 4.587%Sourceo3-mini77.2%SourceClaude Opus 4.5 leads this result
SuperGPQA
Claude Opus 4.570.6%Sourceo3-mini—Not directly comparable
MMLU-Pro
Claude Opus 4.589.5%Sourceo3-mini—Not directly comparable
MMLU-Redux
Claude Opus 4.596.6%Sourceo3-mini—Not directly comparable
C-Eval
Claude Opus 4.592.2%Sourceo3-mini—Not directly comparable
HLE
Claude Opus 4.530.8%Sourceo3-mini—Not directly comparable
MMLU
Claude Opus 4.5—o3-mini86.9%SourceNot directly comparable
Math
AIME26
Claude Opus 4.595.1%Sourceo3-mini—Not directly comparable
HMMT Feb 2025
Claude Opus 4.592.9%Sourceo3-mini—Not directly comparable
HMMT Nov 2025
Claude Opus 4.593.3%Sourceo3-mini—Not directly comparable
HMMT Feb 2026
Claude Opus 4.585.3%Sourceo3-mini—Not directly comparable
MMAnswerBench
Claude Opus 4.584.0%Sourceo3-mini—Not directly comparable
FrontierMath v2 (Tiers 1-3)
Claude Opus 4.520.690%Sourceo3-mini—Not directly comparable
FrontierMath v2 (Tier 4)
Claude Opus 4.54.167%Sourceo3-mini—Not directly comparable
AIME 2024
Claude Opus 4.5—o3-mini87.3%SourceNot directly comparable
Multilingual
Multimodal
MMMU-Pro
Claude Opus 4.570.6%Sourceo3-mini—Not directly comparable
MathVision
Claude Opus 4.574.3%Sourceo3-mini—Not directly comparable
CharXiv
Claude Opus 4.568.5%Sourceo3-mini—Not directly comparable
VideoMMMU
Claude Opus 4.584.4%Sourceo3-mini—Not directly comparable
ScreenSpot Pro
Claude Opus 4.545.7%Sourceo3-mini—Not directly comparable
V*
Claude Opus 4.567.0%Sourceo3-mini—Not directly comparable
Instruction following
Frequently asked questions
Which is better, Claude Opus 4.5 or o3-mini?
Claude Opus 4.5 has the higher public score estimate, 58.41 versus 46.83, 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 Opus 4.5 or o3-mini?
Claude Opus 4.5 scores higher for coding on the public lane, 56.6 to 45.3. Claude Opus 4.5 and o3-mini are scored on Estimated evidence for coding, so the reading is directional rather than like-for-like. BenchLM does not name a winner for coding from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Which is better for agentic tasks, Claude Opus 4.5 or o3-mini?
O3-mini is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, Claude Opus 4.5 or o3-mini?
For the stated presets, chat costs $0.0175 on Claude Opus 4.5 and $0.0033 on o3-mini; repository review costs $0.325 and $0.0682; the cache-heavy agent loop costs $1.35 and $0.286. Claude Opus 4.5 does not fit this workload in one request. o3-mini does not fit this workload in one request. Claude Opus 4.5 has no published cached-input rate, so cached tokens use its listed input rate. o3-mini has no published cached-input rate, so cached tokens use its listed input rate.
Which has the larger context window, Claude Opus 4.5 or o3-mini?
Both models list the same context window, 200K.
Related comparisons
Last updated September 10, 2026
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