Measured on Composite
This model has not carried enough traffic on Composite yet to publish a success rate, a latency figure or a traffic rank. The numbers appear here once it has.
AI model
OpenAI: GPT-6 Astra Pro
openai/gpt-6-astra-pro
OpenAI: GPT-6 Astra Pro is a 1,050,000-token model served on Composite at $6.25 per million tokens in and $31.3 per million tokens out.
Try in PlaygroundSpecifications
| Model ID | openai/gpt-6-astra-pro |
|---|---|
| Provider | OpenAI |
| Context window | 1,050,000 tokens |
| Accepts | file, image, text |
| Returns | text |
| Input price | $6.25 per million tokens |
| Output price | $31.3 per million tokens |
| Prompt caching | Supported — cached input is billed at the provider's cache rate, on credits and plans alike |
| Web search | $0.0125 per result |
| Thinking | Always on for this model |
| Moderated | Yes - by the provider |
| Cost on a monthly plan | About 65 plan credits per typical call (8k in, 1k out) |
| Routing endpoints | 2 (base plus 1 routing variant) |
Routing variants
The same model behind 1 alternative endpoint. Call the id directly to pin a route; the base id above picks for you.
| Route | Model ID | Provider | Price |
|---|---|---|---|
| cheapThink | openai/gpt-6-astra-pro:cheapThink |
OpenAI | $6.25 per million tokens input · $31.3 per million tokens output |
Pricing
$6.25 per million tokens input · $31.3 per million tokens output
Credits pay the provider’s price plus 25%; cache hits cost less.
On a monthly plan, a typical call (8k tokens in, 1k out) uses about 65 plan credits, at the provider's own price.
Provider
OpenAI
Roleplay fit
This is an OpenAI model, a dependable baseline with broad instruction-following and consistent formatting across long conversations.
Context behavior
With a 1,050,000-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.
Cost for regular use
It is priced for quality-sensitive scenes, where writing quality and instruction-following matter more than minimizing per-message cost.
From the provider
GPT-6 Astra Pro is the same underlying model as [GPT-6 Astra](https://openrouter.ai/openai/gpt-6-astra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
Supplied by OpenAI, not written by Composite.
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