GPT-6 Astra
by OpenAIopenai/gpt-6-astra
LLMCompare cannot run GPT-6 Astra yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.
See the models that can be run nowGPT-6 Astra at a glance
- Context length
- 1,050,000 tokens
- Maximum output
- 128,000 tokens
- Accepts
- Text, Image, File
- Returns
- Text
- Features
- ReasoningJSON outputTool callingPrompt cachingImage input
- Reasoning effort levels
maxxhighhighmediumlowReasoning is always on for this model.- Released
- 4 Sep 2026
- Knowledge cutoff
- Not published
Model facts synced from the OpenRouter model list on 21 Oct 2026.
GPT-6 Astra pricing by route
A route is the service LLMCompare calls to reach the model. GPT-6 Astra has 1 route. Prices are in US dollars.
| Route | On LLMCompare | Inputper 1M tokens | Outputper 1M tokens | Cache readper 1M tokens | Cache writeper 1M tokens | Price verified on | Source |
|---|---|---|---|---|---|---|---|
| OpenRouterDefault | Not configured | $10.00 | $50.00 | $1.00 | $12.50 | openrouter.ai/openai/gpt-6-astra |
The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.
Cost calculator
Estimate what a batch of calls to GPT-6 Astra costs. The starting numbers are examples. Change them to match your task.
Part of the input tokens above, billed at the cache read price.
Billed in addition to the output tokens.
- Cost per call
- $0.035
- 42 credits
- Cost of 100 calls
- $3.50
- 4,200 credits
Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.
Parameters you can set
These are the parameters LLMCompare can set when it calls the model through OpenRouter.
| Parameter | Type | Range or options | Default |
|---|---|---|---|
max_tokens | Integer | 1 to 128,000 | Provider default |
reasoning_effort | One of | maxxhighhighmediumlow | medium |
seed | Integer | -2,147,483,648 to 4,294,967,295 | Provider default |
response_format | One of | textjson_object | Provider default |
About GPT-6 Astra
GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon...
Description as published for this model. LLMCompare has not edited it.
Models to compare with GPT-6 Astra
Text models from the same provider and models at the nearest price. The order is not a ranking.
| Add to comparison | Model | Context | Max output | Input priceper 1M tokens | Output priceper 1M tokens | Features | Released | On LLMCompare |
|---|---|---|---|---|---|---|---|---|
GPT-6 Astra ProOpenAIopenai/gpt-6-astra-pro | 1.05M | 128k | $10.00 | $50.00 | ReasoningJSONToolsCacheVision | No route yet | ||
o1OpenAIopenai/o1 | 200k | 100k | $15.00 | $60.00 | JSONToolsCacheVision | No route yet | ||
GPT-4OpenAIopenai/gpt-4 | 8.2k | 4.1k | $30.00 | $60.00 | JSONTools | No route yet | ||
Claude Fable 5.1Anthropicanthropic/claude-fable-5.1 | 1M | 128k | $10.00 | $50.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Claude Fable 5Anthropicanthropic/claude-fable-5 | 1M | 128k | $10.00 | $50.00 | ReasoningJSONToolsCacheVision | No route yet | ||
Claude Opus 4.1Anthropicanthropic/claude-opus-4.1 | 200k | 32k | $15.00 | $75.00 | ToolsCacheVision | No route yet |
Questions about GPT-6 Astra
- How much does GPT-6 Astra cost?
- On the OpenRouter route, GPT-6 Astra costs $10.00 per 1 million input tokens and $50.00 per 1 million output tokens, in US dollars. Input tokens that GPT-6 Astra reads from the prompt cache cost $1.00 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of GPT-6 Astra?
- GPT-6 Astra has a context length of 1,050,000 tokens and returns up to 128,000 output tokens in one call.
- What inputs does GPT-6 Astra accept?
- GPT-6 Astra accepts these inputs: Text, Image, File. GPT-6 Astra returns: Text.
- Which reasoning effort levels does GPT-6 Astra support?
- GPT-6 Astra supports these reasoning effort levels: max, xhigh, high, medium, low. Reasoning is always on for GPT-6 Astra and cannot be turned off.
- Can I test GPT-6 Astra on my own data?
- Not yet. LLMCompare lists the prices and parameters of GPT-6 Astra, but no route to GPT-6 Astra is configured on LLMCompare, so it cannot be selected for an evaluation.