GPT-5.2 Pro
OpenAI · released Dec 10, 2025
- Type
- Closed
- Input
- $21.00
- Output
- $168.00
- Cached
- None held
List price · per 1M tokens · OpenAI at 400K context · source ↗
Our take
Written Sep 5, 2026GPT-5.2 Pro is a proprietary model built for tasks that need an exceptionally large working memory. It can handle up to 400,000 tokens in one request and accepts images and files alongside text, though it comes at a steep cost and very low speed.
Choose this when you need to analyse entire documents or many files together in a single pass, or for agentic workflows with long-horizon reasoning where OpenAI's ecosystem matters more than raw speed. Skip it if you need fast responses, have tight budgets, or want verified quality scores to compare against alternatives.
The case for it
- Among the largest request limits we track: 400,000 tokens fits very long documents or many files at once.
- Accepts text, images and files, making it suitable for multimodal long-horizon tasks.
The case against it
- The highest output cost in its own offer set and among the highest here.
- Extremely slow on OpenAI's own hosting at two tokens per second, enough to bottleneck real-time use.
- No benchmark scores in our data, so quality claims are unverified.
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.
OpenAI, through OpenRouter
The lab is also the cheapest we hold. The strip above and this offer are the same one, so nothing on this page undercuts OpenAI on 400K of context.
- per 1M tokens
- $21.00 in / $168.00 out
- Context served
- 400K
- Throughput
- ~10 tok/s
| Provider | In / out per 1M tokens | Context | Throughput | Trains on prompts | Logs prompts | Zero retention |
|---|---|---|---|---|---|---|
| OpenRouterOpenRouter's own listing | $21.00 / $168.00checked 2 hours ago | 400K | not measured | Unknown | Unknown | Unknown |
| OpenAIThrough OpenRouter | $21.00 / $168.00checked 2 hours ago | 400K128K max reply | 10 tok/s | No | Yesunknown period | Unknown |
OpenRouterAcross the 2 listings we hold: 1 says it does not train on prompts, 0 say they do and 1 does not say. 0 appear 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 | ✓ | ✓ | ✓ |
| OpenAIThrough 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.
Models people weigh against GPT-5.2 Pro
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 hold no cached-input rate for any of its listings.
- 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, images and documents in, text out
- Catalogue slug
- openai-gpt-5-2-pro