OpenAI
GPT-6 Astra
OpenAI's flagship for demanding coding, research, and document work. Inspect the evidence, compare the cost, and start with the exact API configuration below.
Replaces GPT 5.6 Sol: input $2.1 → $10.5 per 1M (+400%), output $10.5 → $52.5 per 1M (+400%), same context window.
Run this model
openai/gpt-6-astra
Use an endpoint supported by this model.
Get a key for this setup →const response = await fetch('https://api.minirouter.sh/v1/responses', { method: 'POST', headers: { Authorization: `Bearer ${process.env.MINIROUTER_KEY}`, 'Content-Type': 'application/json', }, body: JSON.stringify({ model: 'openai/gpt-6-astra', input: 'Why is the sky blue?', max_output_tokens: 1024, }),}) const data = await response.json()console.log(data.output)Use Responses for Astra tool calls. Remove temperature, top_p, and logprob options. Start with a text request; client configurations remain subject to verification.
Model overview
- Input / 1M
- $10.5
- All-in MiniRouter rate
- Output / 1M
- $52.5
- All-in MiniRouter rate
- Context
- 1.1M
- 1,050,000 tokens
- Max output
- 128K
- tokens
- Reasoning
- low → max
- five effort settings
- Tool calls
- Responses
- required by OpenAI
- Announced
- 3 Sept 2026
- publisher release
Publisher-reported results
Compare the work you need it to do.
OpenAI reports gains over GPT-5.6 Sol on terminal tasks, automation, and scientific reasoning. Scores are maxima across evaluated effort settings; its research/API harnesses may differ from your workload.
Astra and GPT-5.6 Sol
Terminal-Bench 4.0
Scores reproduced from OpenAI's launch comparison.
Reported score
0 to 100%
- GPT-6 Astra57.9%
- GPT-5.6 Sol37.3%
View chart data
| Model | Score |
|---|---|
| GPT-6 Astra | 57.9% |
| GPT-5.6 Sol | 37.3% |
Astra and GPT-5.6 Sol
AutomationBench
Scores reproduced from OpenAI's launch comparison.
Reported score
0 to 100%
- GPT-6 Astra41.4%
- GPT-5.6 Sol18.1%
View chart data
| Model | Score |
|---|---|
| GPT-6 Astra | 41.4% |
| GPT-5.6 Sol | 18.1% |
Astra and GPT-5.6 Sol
GPQA Diamond
Scores reproduced from OpenAI's launch comparison.
Reported score
0 to 100%
- GPT-6 Astra96.0%
- GPT-5.6 Sol94.6%
View chart data
| Model | Score |
|---|---|
| GPT-6 Astra | 96.0% |
| GPT-5.6 Sol | 94.6% |
Artificial Analysis
A second view of the tradeoff.
The checked-in measurements are dated 2026-09-04. These evaluate the model's first-party API. They do not measure MiniRouter route speed or reliability.
All effort settings and measurementsGPT-6 Astra (max)
- Intelligence Index
- 54.7#2 of 451 families
- Coding Index
- 76.9
- Output speed
- Not measured
View chart data
| Metric | Value |
|---|---|
| Intelligence Index | 54.7 |
| Coding Index | 76.9 |
| Output speed | Not measured |
Plan the workload
Token price is only part of task cost.
Compare total input, reasoning, output, and retries on representative tasks. The current MiniRouter rates above are the starting point; the figures here describe OpenAI's published Standard pricing rules.
OpenAI model and pricing documentation- 01
Budget input and output together
OpenAI lists $10 per million input tokens and $50 per million output tokens. Its context window is 1,050,000 tokens, with up to 922,000 input and 128,000 output.
- 02
Account for long prompts
Above 272K input tokens, OpenAI applies 2× input and cache rates and 1.5× output rates to the full request. Cache writes and Fast processing have separate rates.
- 03
Check a representative request
Use MiniRouter's request usage and cost records to measure your workload. Independent speed results and publisher task-cost estimates do not establish the cost or latency of your route.
Moving from GPT-5.6 Sol
Check three settings before switching.
The model ID is only one part of the change. Use these OpenAI-documented requirements when adapting your requests, and verify any tool or client workflow through MiniRouter separately.
OpenAI Astra migration guide- 01
Choose a supported reasoning effort
Use low, medium, high, xhigh, or max. Replace none or minimal with low, then evaluate the result on your own tasks.
- 02
Remove sampling overrides
Astra does not accept temperature, top_p, or top_logprobs. Remove Chat Completions logprobs and Responses output-text logprob includes too.
- 03
Use Responses for tools
Text Chat Completions is supported by OpenAI, but Astra tool calling requires Responses. OpenAI's async tools, computer use, and steering features need their own gateway support; a model listing alone does not establish that support.
One route, standard clients.
Authenticate with a MiniRouter bearer key. Caller-provided upstream credentials are not used on this route.
Read model setup docs →https://api.minirouter.sh/v1openai/gpt-6-astra/v1/chat/completions/v1/messages/v1/responsesmax_tokens, stop, tools, tool_choice, reasoning, include_reasoning
Configured provider
Priority follows the live catalog order.
Input: text, image, pdf · Output: text
| Provider | Priority | Input / 1M | Output / 1M | Parameters | Access |
|---|---|---|---|---|---|
vercel | 1 | $10.5 | $52.5 | max_tokens, stop, tools, tool_choice, reasoning, include_reasoning | MiniRouter balance |