GPT-6 Astra (Fast)
Summary
GPT-6 Astra (Fast) is a proprietary language model from OpenAI, released on 4 Sept 2026. It accepts text, images and PDFs and generates text, with a 1.1M-token context window and up to 128K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $20 per million input tokens and $100 per million output tokens (Vercel AI Gateway), across 1 provider we track.
Fast variant of GPT-6 Astra for low-latency assistance and high-volume workloads.
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | OpenAI |
|---|---|
| Release date | 4 Sept 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 1.1M (1,050,000 tokens) [models.dev] |
| Max output | 128K tokens [models.dev] |
| Input | Text, images and PDFs [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
GPT-6 Astra (Fast) API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Vercel AI Gateway openai/gpt-6-astra-fast | $20 | $100 | $2 | 1.1M | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of GPT-6 Astra (Fast)?
GPT-6 Astra (Fast) has a context window of 1,050,000 tokens (1.1M) and can generate up to 128,000 tokens in a single response, according to models.dev.
How much does the GPT-6 Astra (Fast) API cost?
GPT-6 Astra (Fast) is listed from $20 per million input tokens and $100 per million output tokens (Vercel AI Gateway). Prices last verified 4 Oct 2026.
Is GPT-6 Astra (Fast) open source?
No. GPT-6 Astra (Fast) is a proprietary model; OpenAI has not released its weights. It is available through APIs including Vercel AI Gateway.
When was GPT-6 Astra (Fast) released?
OpenAI released GPT-6 Astra (Fast) on 4 Sept 2026, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.