Model comparison
GPT-5-Codex vs Magistral Medium
GPT-5-Codex is the stronger model overall, scoring 37.3 to 34.8 on the Noometry Index.
Last verified . 1 shared benchmarks.
Mistral AISummary
- They share 1 benchmark with published results for both. GPT-5-Codex scores higher in 2 categories and Magistral Medium in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5-Codex leads 30.0 to 8.7.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 70.3% for GPT-5-Codex and 16.2% for Magistral Medium.
- Magistral Medium is cheaper at $2 / $5 per million input/output tokens, against $1.25 / $10 for GPT-5-Codex.
- GPT-5-Codex accepts more context: 400K tokens versus 128K.
- Magistral Medium has downloadable open weights; the other is API-only.
Side by side
| GPT-5-Codex | Magistral Medium | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 37.3 | 34.8 |
| Released | 2025-09-15 | 2025-03-17 |
| Weights | Proprietary | Open |
| Context window | 400K | 128K |
| Max output | 128K | 16K |
| Input $ / M tokens | $1.25 | $2 |
| Output $ / M tokens | $10 | $5 |
| Results tracked | 3 | 22 |
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Category by category
Coding GPT-5-Codex leads
GPT-5-Codex: 41.9 (#100), Magistral Medium: 38.6 (#161)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| SciCode | — | 39.2% |
| WeirdML | 54.5% | — |
| LMArena Coding | — | 1319 |
Agentic & Tool Use Not comparable
GPT-5-Codex: 30.8 (#66), Magistral Medium: —
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| Terminal-Bench | 44.3% | — |
Reasoning GPT-5-Codex leads
GPT-5-Codex: 30.0 (#80), Magistral Medium: 8.7 (#342)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| Kagi LLM Benchmark | 70.3% | 16.2% |
| ARC-AGI-2 | — | 0% |
| ARC-AGI-1 | — | 6.1% |
| CritPt | — | 0.3% |
| LMArena Hard Prompts | — | 1267 |
Math Not comparable
GPT-5-Codex: —, Magistral Medium: 32.4 (#187)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| LMArena Math | — | 1249 |
Knowledge Not comparable
GPT-5-Codex: —, Magistral Medium: 32.9 (#199)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| LMArena Expert | — | 1222 |
Multilingual Not comparable
GPT-5-Codex: —, Magistral Medium: 39.8 (#219)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| LMArena Non-English | — | 1232 |
| LMArena Chinese | — | 1225 |
| LMArena French | — | 1268 |
| LMArena German | — | 1248 |
| LMArena Japanese | — | 1176 |
| LMArena Korean | — | 1125 |
| LMArena Russian | — | 1224 |
| LMArena Spanish | — | 1269 |
Instruction Following Not comparable
GPT-5-Codex: —, Magistral Medium: 66.2 (#207)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| LMArena Instruction Following | — | 1254 |
Long Context Not comparable
GPT-5-Codex: —, Magistral Medium: 39.3 (#178)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| LMArena Longer Query | — | 1295 |
Writing & Preference Not comparable
GPT-5-Codex: —, Magistral Medium: 46.5 (#214)
| Benchmark | GPT-5-Codex | Magistral Medium |
|---|---|---|
| LMArena Text | — | 1255 |
| LMArena Creative Writing | — | 1245 |
| LMArena Multi-Turn | — | 1275 |
Frequently asked questions
Is GPT-5-Codex better than Magistral Medium?
GPT-5-Codex is the stronger model overall, scoring 37.3 to 34.8 on the Noometry Index.
Which is cheaper, GPT-5-Codex or Magistral Medium?
Magistral Medium is cheaper. It lists at $2 per million input tokens and $5 per million output tokens; GPT-5-Codex lists at $1.25 and $10.
Is GPT-5-Codex or Magistral Medium better for coding?
GPT-5-Codex scores higher on coding benchmarks: 41.9 versus 38.6 in the Noometry coding category.
Which has the bigger context window?
GPT-5-Codex does, with 400K tokens against 128K.
How many benchmarks do GPT-5-Codex and Magistral Medium share?
1 benchmark has published results for both models. GPT-5-Codex has 3 scored results on Noometry and Magistral Medium has 22.