Model comparison
Claude Opus 4.1 vs GPT-5 Mini
Claude Opus 4.1 and GPT-5 Mini score almost the same on the Noometry Index (41.0 vs 41.8), so choose on price, context window or the category you care about most.
Last verified . 40 shared benchmarks.
Summary
- They share 40 benchmarks with published results for both. Claude Opus 4.1 scores higher in 6 categories and GPT-5 Mini in 4 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5 Mini leads 46.7 to 22.3.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 12.6% for Claude Opus 4.1 and 46.7% for GPT-5 Mini.
- GPT-5 Mini is cheaper at $0.25 / $2 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
- GPT-5 Mini accepts more context: 400K tokens versus 200K.
Side by side
| Claude Opus 4.1 | GPT-5 Mini | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 41.0 | 41.8 |
| Released | 2025-08-05 | 2025-08-07 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 400K |
| Max output | 32K | 128K |
| Input $ / M tokens | $15 | $0.25 |
| Output $ / M tokens | $75 | $2 |
| Results tracked | 48 | 60 |
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Category by category
Coding Claude Opus 4.1 leads
Claude Opus 4.1: 44.4 (#73), GPT-5 Mini: 40.1 (#146)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| SWE-bench Verified | 73.3% | 64.7% |
| WeirdML | 45.9% | 52.7% |
| LMArena Coding | 1479 | 1406 |
| ALE-Bench | 674.77 | 799.77 |
| AlgoTune | 1.34 | 1.38 |
| SWE-bench Verified (bash only) | — | 59.8% |
| LMArena WebDev | 1390 | — |
| SWE-bench Multilingual | — | 39.7% |
| SciCode | — | 39.2% |
Agentic & Tool Use Claude Opus 4.1 leads
Claude Opus 4.1: 35.0 (#41), GPT-5 Mini: 31.1 (#70)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| Terminal-Bench | 38% | 34.8% |
| Berkeley Function Calling Leaderboard | — | 55.5% |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |
| Vending-Bench 2 | — | -31.18 |
Reasoning Claude Opus 4.1 leads
Claude Opus 4.1: 32.2 (#76), GPT-5 Mini: 23.9 (#168)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| Chess Puzzles | 7% | 30% |
| EnigmaEval | 7.2% | 8.2% |
| LMArena Hard Prompts | 1443 | 1380 |
| Mystery Game Puzzles | 21% | 10% |
| DTBench | 80% | 80.5% |
| LMCA | 37.1% | 34.2% |
| Epoch Capabilities Index | 144.12 | 145.52 |
| ForecastBench | 62 | 61 |
| ARC-AGI-2 | — | 4.4% |
| SimpleBench | 60% | — |
| Kagi LLM Benchmark | — | 70.3% |
| ARC-AGI-1 | — | 54.3% |
| CritPt | — | 0% |
| EBR-Bench | 7.9% | — |
Math GPT-5 Mini leads
Claude Opus 4.1: 22.3 (#277), GPT-5 Mini: 46.7 (#69)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 12.6% | 46.7% |
| FrontierMath Tier 4 | 2.4% | 12.2% |
| OTIS Mock AIME 2024-2025 | 68.9% | 86.7% |
| LMArena Math | 1431 | 1378 |
| FrontierMath (Feb 2025 set) | 7.2% | 27.2% |
| FrontierMath Tier 4 (v1) | 4.2% | 6.3% |
| ProofBench | — | 9% |
| Omni-MATH | — | 72.2% |
| MATH Level 5 | — | 97.8% |
Knowledge GPT-5 Mini leads
Claude Opus 4.1: 42.0 (#101), GPT-5 Mini: 45.6 (#86)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| GPQA Diamond | 77.3% | 75% |
| Humanity's Last Exam | 11.5% | 19.4% |
| Confabulations | 17.1% | 13.3% |
| Vectara Hallucination Rate | 11.8% | 12.9% |
| LMArena Expert | 1439 | 1379 |
| SimpleQA Verified | — | 21.6% |
| MMLU-Pro | — | 83.5% |
| GPQA (HELM) | — | 75.6% |
Multimodal GPT-5 Mini leads
Claude Opus 4.1: 26.8 (#119), GPT-5 Mini: 35.6 (#85)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| VPCT | 35% | 40.2% |
| LMArena Vision | — | 1202 |
Multilingual Claude Opus 4.1 leads
Claude Opus 4.1: 52.0 (#95), GPT-5 Mini: 48.9 (#137)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| LMArena Non-English | 1405 | 1363 |
| LMArena Chinese | 1427 | 1385 |
| LMArena French | 1431 | 1386 |
| LMArena German | 1413 | 1366 |
| LMArena Japanese | 1378 | 1341 |
| LMArena Korean | 1380 | 1308 |
| LMArena Russian | 1422 | 1362 |
| LMArena Spanish | 1448 | 1355 |
Instruction Following Too close to call
Claude Opus 4.1: 75.6 (#58), GPT-5 Mini: 76.2 (#46)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| LMArena Instruction Following | 1435 | 1357 |
| IFEval | — | 92.7% |
Long Context Claude Opus 4.1 leads
Claude Opus 4.1: 44.5 (#63), GPT-5 Mini: 41.9 (#132)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| LMArena Longer Query | 1455 | 1355 |
| Fiction.LiveBench | — | 69.4% |
Writing & Preference Claude Opus 4.1 leads
Claude Opus 4.1: 62.4 (#74), GPT-5 Mini: 55.2 (#148)
| Benchmark | Claude Opus 4.1 | GPT-5 Mini |
|---|---|---|
| LMArena Text | 1419 | 1373 |
| LMArena Creative Writing | 1412 | 1325 |
| Short-Story Creative Writing | 84.7% | 83.1% |
| LMArena Multi-Turn | 1444 | 1363 |
| EQ-Bench Creative Writing | — | 1313 |
| WildBench | — | 85.5% |
Frequently asked questions
Is Claude Opus 4.1 better than GPT-5 Mini?
Claude Opus 4.1 and GPT-5 Mini score almost the same on the Noometry Index (41.0 vs 41.8), so choose on price, context window or the category you care about most.
Which is cheaper, Claude Opus 4.1 or GPT-5 Mini?
GPT-5 Mini is cheaper. It lists at $0.25 per million input tokens and $2 per million output tokens; Claude Opus 4.1 lists at $15 and $75.
Is Claude Opus 4.1 or GPT-5 Mini better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 40.1 in the Noometry coding category.
Which has the bigger context window?
GPT-5 Mini does, with 400K tokens against 200K.
How many benchmarks do Claude Opus 4.1 and GPT-5 Mini share?
40 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and GPT-5 Mini has 60.