OpenAI: GPT-6 Astra Pro

openai/gpt-6-astra-pro · OpenAIUnmeasurable

Declared family: GPT
Declared tokenizer tag: GPT
Entered catalogue: 4 September 2026
Measurement: Unmeasurable: baseline overhead drifts between calls
Evidence confidence: Unknown

What we checked

Four different kinds of evidence, and what each one showed

We checked	What we found	Where it came from
How it counts tokens	Not measured yet	we measured it
How its API is set up	Set up identically to 4 other listings, field for field	api_523f730f
How much it can read and write	Reads up to 1,050,000 tokens at once, writes up to 128,000	its own listing
Whether it thinks before answering	Always reasons, and cannot be turned off, at max, xhigh, high, medium, low, medium by default	its own listing

Declared record

What the catalogue claims about this model

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...

Modalities: text+image+file->text
Declared tokenizer: GPT
Prompt price: $10.0 / M tokens
Completion price: $50.0 / M tokens

Supported parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetoolsverbosity

defaults: {}

Catalogue entry

History

Every observation, kept as taken

4 September 2026Enters the OpenRouter catalogue declared as GPT.