Very long inputs
Choose GPT-5-Codex
GPT-5-Codex reads up to 400k tokens per request, against 256k for Command A Reasoning.
Command A Reasoning vs GPT-5-Codex: price, context and capabilities
Choose GPT-5-Codex for very long inputs, images as input and the latest release; 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.
- GPT-5-Codex reads more per request: 400k tokens against 256k.
- GPT-5-Codex is the newer model (Sep 23, 2025, against August 2025).
- Only GPT-5-Codex offers vision, structured output, batch api.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Images as input
Choose GPT-5-Codex
GPT-5-Codex accepts images as input; Command A Reasoning does not.
Latest release
Choose GPT-5-Codex
GPT-5-Codex is the newer release (Sep 23, 2025, against August 2025 for Command A Reasoning).
Specifications side by side
| Command A Reasoning | GPT-5-Codex | |
|---|---|---|
| Provider | Cohere | OpenAI |
| Category | Language models | Language models |
| Status | Generally available | Deprecated |
| Headline price | No data | No data |
| Input | No data | No data |
| Output | No data | No data |
| Cached input | No data | No data |
| Context window | 256k | 400k |
| Max output | No data | 128k |
| Released | August 2025 | Sep 23, 2025 |
| Knowledge cutoff | No data | September 2024 |
| Licence | Proprietary | Proprietary |
| Capabilities | Reasoning, Tool calling | Vision, Reasoning, Tool calling, Structured output, Batch API |
| API model id | command-a-reasoning-08-2025 | gpt-5-codex |
Benchmarks side by side
Leader in bold.
| Benchmark | Command A Reasoning | GPT-5-Codex |
|---|---|---|
| Terminal-Bench Hard | No data | 37.9% |
| GPQA Diamond | No data | 83.7% |
| Humanity's Last Exam | No data | 27.8% |
| IFBench (instruction following) | No data | 74.1% |
| τ²-Bench (agentic tool use) | No data | 86.8% |
| MMMU-Pro (visual reasoning) | No data | 73.8% |
| Long-context reasoning (AA-LCR) | No data | 71.7% |
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 Command A Reasoning or GPT-5-Codex?
Choose GPT-5-Codex for very long inputs, images as input and the latest release; on the other points the two are level or the data is missing.
Which is cheaper, Command A Reasoning or GPT-5-Codex?
A price comparison is not possible: one of them has no comparable published price.
Which has the larger context window, Command A Reasoning or GPT-5-Codex?
GPT-5-Codex reads more per request: 400k tokens against 256k.
What is the difference between Command A Reasoning and GPT-5-Codex?
Command A Reasoning is made by Cohere and GPT-5-Codex by OpenAI. A price comparison is not possible: one of them has no comparable published price. GPT-5-Codex reads more per request: 400k tokens against 256k. GPT-5-Codex is the newer model (Sep 23, 2025, against August 2025). Only GPT-5-Codex offers vision, structured output, batch api.
Which is newer, Command A Reasoning or GPT-5-Codex?
GPT-5-Codex was released on Sep 23, 2025 and Command A Reasoning on August 2025.