Model comparison
GPT-5.3 Codex vs Ministral 3B
GPT-5.3 Codex is the stronger model overall, scoring 45.5 to 25.6 on the Noometry Index. Ministral 3B costs 120× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
Mistral AISummary
- They share 1 benchmark with published results for both.
- Ministral 3B is cheaper at $0.04 / $0.04 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Codex.
- GPT-5.3 Codex accepts more context: 400K tokens versus 128K.
- Ministral 3B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.3 Codex | Ministral 3B | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 45.5 | 25.6 |
| Released | 2026-02-05 | 2024-10-01 |
| Weights | Proprietary | Open |
| Context window | 400K | 128K |
| Max output | 128K | 128K |
| Input $ / M tokens | $1.75 | $0.04 |
| Output $ / M tokens | $14 | $0.04 |
| Results tracked | 8 | 6 |
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Category by category
Coding Not comparable
GPT-5.3 Codex: 48.5 (#51), Ministral 3B: —
| Benchmark | GPT-5.3 Codex | Ministral 3B |
|---|---|---|
| SWE-bench Verified | 74.8% | — |
| LMArena WebDev | 1408 | — |
| WeirdML | 79.3% | — |
| ALE-Bench | 1,655 | — |
Agentic & Tool Use Not comparable
GPT-5.3 Codex: 47.8 (#9), Ministral 3B: —
| Benchmark | GPT-5.3 Codex | Ministral 3B |
|---|---|---|
| Terminal-Bench | 78.4% | — |
| METR Time Horizons | 74.5% | — |
| Vending-Bench 2 | 5,940 | — |
Reasoning Not comparable
GPT-5.3 Codex: —, Ministral 3B: 17.7 (#278)
| Benchmark | GPT-5.3 Codex | Ministral 3B |
|---|---|---|
| Epoch Capabilities Index | 156.84 | 118.08 |
| DTBench | — | 51.7% |
| LMCA | — | 5.5% |
Math Not comparable
GPT-5.3 Codex: —, Ministral 3B: 24.5 (#257)
| Benchmark | GPT-5.3 Codex | Ministral 3B |
|---|---|---|
| MATH Level 5 | — | 14.4% |
Knowledge Not comparable
GPT-5.3 Codex: —, Ministral 3B: 10.4 (#297)
| Benchmark | GPT-5.3 Codex | Ministral 3B |
|---|---|---|
| GPQA Diamond | — | 25.3% |
| Vectara Hallucination Rate | — | 7.3% |
Frequently asked questions
Is GPT-5.3 Codex better than Ministral 3B?
GPT-5.3 Codex is the stronger model overall, scoring 45.5 to 25.6 on the Noometry Index. Ministral 3B costs 120× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.
Which is cheaper, GPT-5.3 Codex or Ministral 3B?
Ministral 3B is cheaper. It lists at $0.04 per million input tokens and $0.04 per million output tokens; GPT-5.3 Codex lists at $1.75 and $14.
Which has the bigger context window?
GPT-5.3 Codex does, with 400K tokens against 128K.
How many benchmarks do GPT-5.3 Codex and Ministral 3B share?
1 benchmark has published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and Ministral 3B has 6.