Model comparison
Claude Opus 4.5 vs Ministral 8B
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 28.2 on the Noometry Index. Ministral 8B costs 67× less per token, which makes it the better buy when Claude Opus 4.5's lead doesn't matter for your workload.
Last verified . 16 shared benchmarks.
Mistral AISummary
- They share 16 benchmarks with published results for both. Claude Opus 4.5 scores higher in 9 categories and Ministral 8B in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Claude Opus 4.5 leads 56.5 to 12.6.
- The biggest single-benchmark swing is Berkeley Function Calling Leaderboard: 77.5% for Claude Opus 4.5 and 11.1% for Ministral 8B.
- Ministral 8B is cheaper at $0.15 / $0.15 per million input/output tokens, against $5 / $25 for Claude Opus 4.5.
- Ministral 8B accepts more context: 262K tokens versus 200K.
- Ministral 8B has downloadable open weights; the other is API-only.
Side by side
| Claude Opus 4.5 | Ministral 8B | |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 50.5 | 28.2 |
| Released | 2025-11-01 | 2024-10-01 |
| Weights | Proprietary | Open |
| Context window | 200K | 262K |
| Max output | 64K | 262K |
| Input $ / M tokens | $5 | $0.15 |
| Output $ / M tokens | $25 | $0.15 |
| Results tracked | 69 | 17 |
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Category by category
Coding Claude Opus 4.5 leads
Claude Opus 4.5: 54.8 (#27), Ministral 8B: 35.0 (#230)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| LMArena Coding | 1504 | 1202 |
| SWE-bench Verified | 76.7% | — |
| SWE-bench Verified (bash only) | 76.8% | — |
| LMArena WebDev | 1494 | — |
| SWE-bench Multilingual | 70.7% | — |
| GSO | 26.5% | — |
| WeirdML | 63.7% | — |
| ALE-Bench | 1,025 | — |
| AlgoTune | 1.77 | — |
Agentic & Tool Use Claude Opus 4.5 leads
Claude Opus 4.5: 47.3 (#12), Ministral 8B: 16.4 (#148)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| Berkeley Function Calling Leaderboard | 77.5% | 11.1% |
| Terminal-Bench | 63.1% | — |
| GDPval | 45.5% | — |
| Remote Labor Index | 3.8% | — |
| τ²-bench Airline | 84% | — |
| τ²-bench Banking | 24.7% | — |
| τ²-bench Retail | 79.6% | — |
| τ²-bench Telecom | 92.3% | — |
| Cybench | 82% | — |
| DeepResearch Bench | 54.8% | — |
| OSWorld | 66.3% | — |
| BALROG | 43.5% | — |
| LMArena Search | 1180 | — |
| METR Time Horizons | 75% | — |
| Vending-Bench 2 | 4,967 | — |
Reasoning Claude Opus 4.5 leads
Claude Opus 4.5: 42.6 (#51), Ministral 8B: 18.4 (#281)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| LMArena Hard Prompts | 1476 | 1191 |
| DTBench | 89.9% | 45.7% |
| ARC-AGI-2 | 37.6% | — |
| SimpleBench | 62% | — |
| Kagi LLM Benchmark | 80.2% | — |
| NYT Connections (extended) | 52.5% | — |
| ARC-AGI-1 | 80% | — |
| Chess Puzzles | 12% | — |
| EnigmaEval | 11.9% | — |
| EBR-Bench | 14.3% | — |
| Mystery Game Puzzles | 22% | — |
| LMCA | 44.5% | — |
| Epoch Capabilities Index | 150.09 | — |
| ForecastBench | 60.7 | — |
Math Claude Opus 4.5 leads
Claude Opus 4.5: 38.6 (#132), Ministral 8B: 25.7 (#267)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| LMArena Math | 1463 | 1188 |
| FrontierMath (Tiers 1-3) | 34.4% | — |
| FrontierMath Tier 4 | 4.9% | — |
| OTIS Mock AIME 2024-2025 | 86.1% | — |
| ProofBench | 36% | — |
| MATH Level 5 | — | 14.9% |
| FrontierMath (Feb 2025 set) | 20.7% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Claude Opus 4.5 leads
Claude Opus 4.5: 56.5 (#44), Ministral 8B: 12.6 (#297)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| GPQA Diamond | 86% | 27.1% |
| Vectara Hallucination Rate | 10.9% | 7.4% |
| LMArena Expert | 1487 | 1170 |
| Humanity's Last Exam | 25.2% | — |
| SimpleQA Verified | 45.7% | — |
Multimodal Not comparable
Claude Opus 4.5: 31.4 (#107), Ministral 8B: —
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| GeoBench | 75% | — |
| VPCT | 40% | — |
| Furniture Assembly | 28.3% | — |
| LMArena Document | 1462 | — |
Multilingual Claude Opus 4.5 leads
Claude Opus 4.5: 54.3 (#47), Ministral 8B: 35.1 (#247)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| LMArena Non-English | 1438 | 1165 |
| LMArena Chinese | 1470 | 1193 |
| LMArena Russian | 1447 | 1195 |
| LMArena French | 1471 | — |
| LMArena German | 1449 | — |
| LMArena Japanese | 1416 | — |
| LMArena Korean | 1424 | — |
| LMArena Spanish | 1458 | — |
Instruction Following Claude Opus 4.5 leads
Claude Opus 4.5: 77.5 (#19), Ministral 8B: 60.5 (#250)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| LMArena Instruction Following | 1478 | 1161 |
Long Context Claude Opus 4.5 leads
Claude Opus 4.5: 46.5 (#22), Ministral 8B: 36.7 (#227)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| LMArena Longer Query | 1480 | 1212 |
| CL-bench | 21.1% | — |
Writing & Preference Claude Opus 4.5 leads
Claude Opus 4.5: 68.1 (#28), Ministral 8B: 39.6 (#246)
| Benchmark | Claude Opus 4.5 | Ministral 8B |
|---|---|---|
| LMArena Text | 1451 | 1191 |
| LMArena Creative Writing | 1445 | 1175 |
| LMArena Multi-Turn | 1466 | 1166 |
| EQ-Bench Creative Writing | 1687 | — |
Frequently asked questions
Is Claude Opus 4.5 better than Ministral 8B?
Claude Opus 4.5 is the stronger model overall, scoring 50.5 to 28.2 on the Noometry Index. Ministral 8B costs 67× less per token, which makes it the better buy when Claude Opus 4.5's lead doesn't matter for your workload.
Which is cheaper, Claude Opus 4.5 or Ministral 8B?
Ministral 8B is cheaper. It lists at $0.15 per million input tokens and $0.15 per million output tokens; Claude Opus 4.5 lists at $5 and $25.
Is Claude Opus 4.5 or Ministral 8B better for coding?
Claude Opus 4.5 scores higher on coding benchmarks: 54.8 versus 35.0 in the Noometry coding category.
Which has the bigger context window?
Ministral 8B does, with 262K tokens against 200K.
How many benchmarks do Claude Opus 4.5 and Ministral 8B share?
16 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Ministral 8B has 17.