[python]: Type hint on `SessionConfig.model` should be `str` rather than `Literal`?

[harupy]

For example, claude-opus-4.5 should be valid, but a type checker rejects it

copilot-sdk/python/copilot/types.py

Line 201 in 6a4fca8

model: Literal["gpt-5", "claude-sonnet-4", "claude-sonnet-4.5", "claude-haiku-4.5"]

[github-actions]

Thanks for opening this issue, @harupy!

You're right that the current Literal type for SessionConfig.model is too restrictive. The type hint should allow any string value since the SDK supports additional models beyond the four currently listed (like claude-opus-4.5).

I've labeled this as an enhancement for the Python SDK. This should be a straightforward fix to change the type hint from Literal[...] to str.

AI generated by Issue Triage Agent

[SilentDemonSD]

For example, claude-opus-4.5 should be valid, but a type checker rejects it

copilot-sdk/python/copilot/types.py

Line 201 in 6a4fca8

model: Literal["gpt-5", "claude-sonnet-4", "claude-sonnet-4.5", "claude-haiku-4.5"]

Full supported model list should be placed, but it isnt updated yet (i guess)

List Models: claude-sonnet-4.5, claude-haiku-4.5, claude-opus-4.5, claude-sonnet-4, gpt-5.2-codex, gpt-5.1-codex-max, gpt-5.1-codex, gpt-5.2, gpt-5.1, gpt-5, gpt-5.1-codex-mini, gpt-5-mini, gpt-4.1, gemini-3-pro-preview

[cmart12]

Closing — this was addressed in v0.1.21 via PR #325, which replaced the Literal type hint on SessionConfig.model with str in the Python SDK.

[cmart12]

Reopening — closed prematurely during analysis. Will re-evaluate before any further action.

[stephentoub]

Generated by Copilot.

I believe this has already been fixed/addressed.

Fix summary: The Python SDK now types SessionConfig.model as a plain str, so callers are no longer restricted to an outdated literal model list.

Closing this as completed.