Model comparison
GPT-5.3 Chat vs Magistral Small
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.2 on the Noometry Index. Magistral Small costs 6.4× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Mistral AISummary
- The widest gap is in reasoning, where GPT-5.3 Chat leads 28.5 to 6.8.
- Magistral Small is cheaper at $0.50 / $1.50 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Magistral Small has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Chat | Magistral Small | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 42.8 | 30.2 |
| Released | 2026-03-03 | 2025-06-10 |
| Weights | Proprietary | Open |
| Context window | 128K | 128K |
| Max output | 16K | 40K |
| Input $ / M tokens | $1.75 | $0.50 |
| Output $ / M tokens | $14 | $1.50 |
| Results tracked | 18 | 10 |
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Category by category
Coding GPT-5.3 Chat leads
GPT-5.3 Chat: 41.4 (#124), Magistral Small: 38.4 (#176)
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| SciCode | — | 35.2% |
| LMArena Coding | 1408 | — |
Reasoning GPT-5.3 Chat leads
GPT-5.3 Chat: 28.5 (#102), Magistral Small: 6.8 (#350)
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| ARC-AGI-2 | — | 0% |
| Kagi LLM Benchmark | — | 6.3% |
| ARC-AGI-1 | — | 5% |
| CritPt | — | 0.3% |
| Chess Puzzles | — | 3% |
| LMArena Hard Prompts | 1399 | — |
| DTBench | — | 61.3% |
| Epoch Capabilities Index | — | 133.19 |
Math GPT-5.3 Chat leads
GPT-5.3 Chat: 38.2 (#142), Magistral Small: 26.2 (#261)
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| OTIS Mock AIME 2024-2025 | — | 30% |
| LMArena Math | 1389 | — |
Knowledge GPT-5.3 Chat leads
GPT-5.3 Chat: 38.8 (#140), Magistral Small: 30.9 (#223)
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| GPQA Diamond | — | 56.1% |
| LMArena Expert | 1397 | — |
Multilingual Not comparable
GPT-5.3 Chat: 50.3 (#124), Magistral Small: —
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| LMArena Non-English | 1382 | — |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |
Instruction Following Not comparable
GPT-5.3 Chat: 72.8 (#129), Magistral Small: —
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| LMArena Instruction Following | 1378 | — |
Long Context Not comparable
GPT-5.3 Chat: 42.6 (#120), Magistral Small: —
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| LMArena Longer Query | 1396 | — |
Writing & Preference Not comparable
GPT-5.3 Chat: 63.1 (#68), Magistral Small: —
| Benchmark | GPT-5.3 Chat | Magistral Small |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1412 | — |
Frequently asked questions
Is GPT-5.3 Chat better than Magistral Small?
GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 30.2 on the Noometry Index. Magistral Small costs 6.4× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.
Which is cheaper, GPT-5.3 Chat or Magistral Small?
Magistral Small is cheaper. It lists at $0.50 per million input tokens and $1.50 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.
Is GPT-5.3 Chat or Magistral Small better for coding?
GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 38.4 in the Noometry coding category.
Which has the bigger context window?
Both accept 128K tokens.
How many benchmarks do GPT-5.3 Chat and Magistral Small share?
0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Magistral Small has 10.