OpenCode v1.18.27

OpenCode v1.18.27 was released on .

Summary

Core Bugfixes - Default provider header timeouts to five minutes so slow model startups fail less often. - Default streamed chunk timeouts to five minutes, with false supported to disable them. - L...

Release Context

  • This was the 188th OpenCode release of 2026 tracked by Havoptic.
  • It shipped 1 day after OpenCode v1.18.26 (September 1, 2026).

Shipped around the same time

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Release Notes

Core Bugfixes - Default provider header timeouts to five minutes so slow model startups fail less often. - Default streamed chunk timeouts to five minutes, with false supported to disable them. - Let Anthropic thinking.blockBinding opt out via config when you need to keep the provider default. (@dkindlund) - Limit Anthropic thinking block binding to Claude 5.1+ models so older deployments do not reject requests. - Avoid unhandled errors when canceling timed-out SSE reads. (@AlexanderWillner) Thank you to 2 community contributors: - @AlexanderWillner: - fix(provider): handle SSE reader cancel rejections (44944) - @dkindlund: - fix(opencode): let config opt out of Anthropic thinking blockBinding (46820)

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