Is GPT-6 supported now? ETA if not

[div002123]

It looks like GPT-6 isn't supported right now — when will support be added?

Or am I misunderstanding and it's already supported?

I haven't been able to find any related discussions/issues.

[gyanu2507]

Yes. GPT-6 Astra shipped on 3 Sep 2026. The API model id is gpt-6-astra. The Python SDK does not need a special enum. Pass that string.

Use the Responses API:

from openai import OpenAI

client = OpenAI()
resp = client.responses.create(
    model="gpt-6-astra",
    input="ping",
)
print(resp.output_text)

A few gotchas from the current model guide:

• There is no gpt-6 alias. Use gpt-6-astra.
• Tool calling needs Responses, not Chat Completions.
• reasoning.effort cannot be none. Start from low / medium.
• Drop temperature, top_p, and logprobs. Astra rejects them.

If openai.OpenAI raises NotFoundError for that model, it is almost always project access (Astra rolled out in waves) rather than a missing SDK constant. client.models.retrieve("gpt-6-astra") is a quick check.

Docs: Using GPT-6 Astra and the 3 Sep changelog.

[div002123]

Thank you, I posted this in the wrong place. What I actually wanted to ask about is Codex's Python SDK.