Q: How can I set header for Convex Agent?

[mrekh]

I want to use the Clause 4/4.5 1M context window, but according to the AI Gateway documentation, I need to pass a header. How can I set this header for my Convex Agent?

Claude Sonnet 4.5 now supports a 1M-token context (beta); opt in by sending the anthropic-beta: context-1m-2025-08-07 header.

Source: https://vercel.com/ai-gateway/models/claude-sonnet-4.5

[ianmacartney]

I'd suspect it'd be either configured when creating the model or passing providerOptions. However AI SDK docs / examples do it should work

…

On Tue, Sep 30, 2025 at 11:04 AM Alireza Esmikhani ***@***.***> wrote: *mrekh* created an issue (get-convex/agent#165) <#165> I want to use the Clause 4/4.5 1M context window, but according to the AI Gateway documentation, I need to pass a header. How can I set this header for my Convex Agent? Claude Sonnet 4.5 now supports a 1M-token context (beta); opt in by sending the anthropic-beta: context-1m-2025-08-07 header. Source: *https://vercel.com/ai-gateway/models/claude-sonnet-4.5 <https://vercel.com/ai-gateway/models/claude-sonnet-4.5>* — Reply to this email directly, view it on GitHub <#165>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACZQW2KYW5YYCV63OBOZGD3VLA4JAVCNFSM6AAAAACH5TIPMWVHI2DSMVQWIX3LMV43ASLTON2WKOZTGQ3TANJRGY3TKMI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[mrekh]

Much appreciated if you could please include these examples. As I’m testing (including the mentioned header option in the providerOptions), I can’t verify if it’s working - I don’t get any errors, but when I check the API response, it doesn’t show that it’s now handling up to 1M context.

Also, this option isn’t available through the Anthropic provider options.