GPT-5.1-Codex-Max
OpenAI · released Dec 4, 2025
- Type
- Closed
- Input
- None held
- Output
- None held
- Cached
- None held
We don't hold a list price for this model yet · hosted only — we have no record of published weights
Our take
Written Sep 30, 2026GPT-5.1-Codex-Max is a hosted-only model: we list no download for it, so using it means choosing a host, and the two hosts we list charge the same rate. Nothing here measures its quality, so treat it as a candidate to trial on work you can check yourself.
Reach for it when you are already committed to working through a host and want a request capacity that takes long documents whole, without splitting them up first. Images can go in beside the question, so a screenshot does not have to be described in words first. Skip it if you need measured evidence of coding or reasoning quality before you commit, or if you meant to run the model on your own machine.
The case for it
- Long documents go in whole rather than being split up first, though reliable recall across all of it is unverified in our data.
- Text and images go into the same request, so a screenshot does not have to be described in words first.
The case against it
- No benchmark scores are supplied, so nothing here tells you how well it codes or reasons; that needs a trial on work you can check yourself.
- We list no download for it, so a host is the only route we can point you to, and the two hosts listed charge the same rate.
How good is it?
We hold no score for this model.
So there is no figure here for everyday use, coding, agent work or writing. That is a gap in our data, not a low score.
Where to rent it
Prices checked 2 hours ago — each listing carries its own date.
- per 1M tokens
- $1.25 in / $10.00 out
- Context served
- 400K
- Throughput
- ~32 tok/s
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouterOpenRouter's own listing | $1.25 / $10.00checked 2 hours ago | 400K | not measured | Unknown | Unknown | Unknown |
| Microsoft Azure AIThrough OpenRouter | $1.25 / $10.00checked 2 hours ago | 400K128K max reply | 32 tok/s | No | No | Confirmed |
OpenRouterAcross the 2 listings we hold: 1 says it does not train on prompts, 0 say they do and 1 does not say. 1 appears in the zero-retention registry we check; the rest are unknown to us.
What each host's API supports
From the parameter list each endpoint publishes. Streaming is omitted: nothing we hold reports it, for any model.
| Provider | Tool calling | JSON output | Strict schema |
|---|---|---|---|
| OpenRouterOpenRouter's own listing | ✓ | ✓ | ✓ |
| Microsoft Azure AIThrough OpenRouter | ✓ | ✓ | ✓ |
Tool calling: 2 of 2 listings say yes. JSON output: 2 of 2 listings say yes. Strict schema: 2 of 2 listings say yes.
When we formed this view
Recent changes
What moved
first indexed by our pipelineEach date is the day we first saw the change, or the day the maker announced it.
What we do not know about this model yet
- No independent board has scored it, so we hold no quality figures at all.
- Nothing we hold says whether an endpoint streams, so we do not show it either way.
- 1 of 2 listings does not say whether it trains on prompts.
- We don't hold a list price for this model yet — the gap is ours, not the lab's.
- We hold no batch or off-peak rate for any of its listings.
Licence and identifiers
What the licence allowsWe hold no licence record for this model. Inside are the identifiers you need to pull it — its Hugging Face repo where we have one, our slug and a machine-readable card.
Licence
We hold no licence record for this model, and no record of published weights either — so we can neither summarise its terms nor point you at the weights.
Identifiers
- Takes in, gives back
- Text and images in, text out
- Catalogue slug
- openai-gpt-5-1-codex-max