Very long inputs
Choose Mistral Small 4
Mistral Small 4 reads up to 256k tokens per request, against 128k for GPT-5.3 Chat.
GPT-5.3 Chat vs Mistral Small 4: price, context and capabilities
Choose Mistral Small 4 for very long inputs and self-hosting and data control; on the other points the two are level or the data is missing.
In short
- A price comparison is not possible: one of them has no comparable published price.
- Mistral Small 4 reads more per request: 256k tokens against 128k.
- Only GPT-5.3 Chat offers batch api.
- Only Mistral Small 4 offers self-hostable.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Self-hosting and data control
Choose Mistral Small 4
Mistral Small 4 has open weights, so you can run it on your own servers; GPT-5.3 Chat is only available through its provider.
Specifications side by side
| GPT-5.3 Chat | Mistral Small 4 | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Category | Language models | Language models |
| Status | Deprecated | Generally available |
| Headline price | No data | No data |
| Input | No data | No data |
| Output | No data | No data |
| Cached input | No data | No data |
| Context window | 128k | 256k |
| Max output | 16k | No data |
| Released | Mar 3, 2026 | March 2026 |
| Knowledge cutoff | August 2025 | No data |
| Licence | Proprietary | Open weights |
| Capabilities | Vision, Reasoning, Tool calling, Structured output, Batch API | Vision, Reasoning, Tool calling, Structured output, Self-hostable |
| API model id | gpt-5.3-chat-latest | mistral-small-2603 |
Benchmarks side by side
Leader in bold.
| Benchmark | GPT-5.3 Chat | Mistral Small 4 |
|---|---|---|
| Intelligence Index | No data | 11.3 |
| Terminal-Bench Hard | No data | 17.4% |
| SciCode | No data | 38.8% |
| GPQA Diamond | No data | 76.9% |
| Humanity's Last Exam | No data | 9.9% |
| IFBench (instruction following) | No data | 48.2% |
| τ²-Bench (agentic tool use) | No data | 41.2% |
| MMMU-Pro (visual reasoning) | No data | 56.8% |
| Long-context reasoning (AA-LCR) | No data | 49.7% |
Independent evaluations by Artificial Analysis, run the same way for every model, at the reasoning setting shown. Percentages unless marked as an index.
Frequently asked questions
Should I choose GPT-5.3 Chat or Mistral Small 4?
Choose Mistral Small 4 for very long inputs and self-hosting and data control; on the other points the two are level or the data is missing.
Which is cheaper, GPT-5.3 Chat or Mistral Small 4?
A price comparison is not possible: one of them has no comparable published price.
Which has the larger context window, GPT-5.3 Chat or Mistral Small 4?
Mistral Small 4 reads more per request: 256k tokens against 128k.
What is the difference between GPT-5.3 Chat and Mistral Small 4?
GPT-5.3 Chat is made by OpenAI and Mistral Small 4 by Mistral AI. A price comparison is not possible: one of them has no comparable published price. Mistral Small 4 reads more per request: 256k tokens against 128k. Only GPT-5.3 Chat offers batch api. Only Mistral Small 4 offers self-hostable.