GLM 5.2 appears to show a 200k context window in Cursor. not sure how to fix this? it’s supposed to be 1M. another user has posted on this same issue with no help yet.

GLM 5.2 isn’t an option in Cursor though

it’s via BYOK, this is a known issue for some BYOK models because if cursor doesn’t have them as registered (into the available model to use inside cursor as BYOK), it caps the context window at 200k to be secure

How long does Cursor typically take to add the latest models? Really wanting to try GLM 5.2 now that Fable has bitten the dust. I can’t even get it to work. Keeps giving me errors.

Hey, this isn’t a bug. It’s the current behavior for custom OpenAI-compatible models. For models that aren’t in Cursor’s catalog, Cursor sets the context window to 1M by default. Cursor can’t auto-detect the real context window from your provider. You might see 200K if the model name matches someth…

How did you get GLM 5.2 into Cursor?

Hey @HumanChapter it’s via custom models! Learn about BYOK

I know about it, but none of the supported providers mentioned in the BYOK page support GLM 5.2. I tried setting the base URL for Fireworks AI for example, but it doesn’t work. What provider did you try?

[image] Cursor Native Agent fails with glm-5.2 via OpenAI-compatible provider, while other agents work Bug Reports It’s there!

Context window size for GLM 5.2 needs to be fixed

Support Help

Tom_Coustols (Tom Coustols) June 24, 2026, 10:09pm 13

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Custom OpenAI-Compatible Model Shows 200K Context Limit for GLM-5.2, Even Though It Supports 1M Context Help context , byok	8	914	July 9, 2026
Cursor Native Agent fails with glm-5.2 via OpenAI-compatible provider, while other agents work Bug Reports byok	5	663	July 19, 2026
GLM-5.2 AI model not found Help byok	5	476	June 25, 2026
Bedrock x Fable: Hard-capped at 200K context for custom AWS Bedrock Claude models? Help byok , anthropic , bedrock	1	39	July 24, 2026
Can't Use BYOK GLM 5.2 from Scaleway in Cursor Bug Reports byok	4	150	June 30, 2026

Context window size for GLM 5.2 needs to be fixed

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