Model comparison
GPT-5 Pro vs Magistral Small
GPT-5 Pro is the stronger model overall, scoring 46.4 to 30.2 on the Noometry Index. Magistral Small costs 55× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.
Last verified . 4 shared benchmarks.
Mistral AISummary
- They share 4 benchmarks with published results for both. GPT-5 Pro scores higher in 4 categories and Magistral Small in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5 Pro leads 38.9 to 6.8.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 76.8% for GPT-5 Pro and 6.3% for Magistral Small.
- Magistral Small is cheaper at $0.50 / $1.50 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- GPT-5 Pro accepts more context: 400K tokens versus 128K.
- Magistral Small has downloadable open weights; the other is API-only.
Side by side
| GPT-5 Pro | Magistral Small | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 46.4 | 30.2 |
| Released | 2025-10-06 | 2025-06-10 |
| Weights | Proprietary | Open |
| Context window | 400K | 128K |
| Max output | 272K | 40K |
| Input $ / M tokens | $15 | $0.50 |
| Output $ / M tokens | $120 | $1.50 |
| Results tracked | 12 | 10 |
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Category by category
Coding GPT-5 Pro leads
GPT-5 Pro: 44.0 (#80), Magistral Small: 38.4 (#176)
Reasoning GPT-5 Pro leads
GPT-5 Pro: 38.9 (#62), Magistral Small: 6.8 (#350)
| Benchmark | GPT-5 Pro | Magistral Small |
|---|---|---|
| ARC-AGI-2 | 18.3% | 0% |
| Kagi LLM Benchmark | 76.8% | 6.3% |
| ARC-AGI-1 | 70.2% | 5% |
| Epoch Capabilities Index | 150.28 | 133.19 |
| SimpleBench | 61.6% | — |
| CritPt | — | 0.3% |
| Chess Puzzles | — | 3% |
| EnigmaEval | 18.8% | — |
| DTBench | — | 61.3% |
Math GPT-5 Pro leads
GPT-5 Pro: 48.5 (#63), Magistral Small: 26.2 (#261)
| Benchmark | GPT-5 Pro | Magistral Small |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| OTIS Mock AIME 2024-2025 | — | 30% |
| FrontierMath Tier 4 (v1) | 14.6% | — |
Knowledge GPT-5 Pro leads
GPT-5 Pro: 56.7 (#42), Magistral Small: 30.9 (#223)
| Benchmark | GPT-5 Pro | Magistral Small |
|---|---|---|
| GPQA Diamond | — | 56.1% |
| Humanity's Last Exam | 31.6% | — |
Frequently asked questions
Is GPT-5 Pro better than Magistral Small?
GPT-5 Pro is the stronger model overall, scoring 46.4 to 30.2 on the Noometry Index. Magistral Small costs 55× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5 Pro or Magistral Small?
Magistral Small is cheaper. It lists at $0.50 per million input tokens and $1.50 per million output tokens; GPT-5 Pro lists at $15 and $120.
Is GPT-5 Pro or Magistral Small better for coding?
GPT-5 Pro scores higher on coding benchmarks: 44.0 versus 38.4 in the Noometry coding category.
Which has the bigger context window?
GPT-5 Pro does, with 400K tokens against 128K.
How many benchmarks do GPT-5 Pro and Magistral Small share?
4 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Magistral Small has 10.