OpenCode v1.18.17

OpenCode v1.18.17 was released on .

Summary

Core Bugfixes - Made session compaction keep complete recent turns and produce clearer summaries for smaller models. - Added MERGE Gateway reasoning variants so those model options work correctly....

Release Context

  • This was the 178th OpenCode release of 2026 tracked by Havoptic.
  • It shipped 3 days after OpenCode v1.18.16 (August 10, 2026).

Shipped around the same time

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Release Notes

Core Bugfixes - Made session compaction keep complete recent turns and produce clearer summaries for smaller models. - Added MERGE Gateway reasoning variants so those model options work correctly. (@MatthewFeroz) - Capped automatic session retries and added jitter to reduce repeated retry storms. - Enabled PDF attachments for GitHub Copilot models that advertise PDF vision support. (@stevenao) - Applied the correct sampling defaults to DeepSeek V4 Flash on supported providers. - Routed all Muse family models to the correct Meta system prompt. (@mreso) Desktop Bugfixes - Updated Chinese developer terminology to use more widely recognized translations. - Used the server's current default model instead of stale local config when choosing the default model. Thank you to 6 community contributors: - @mreso: - fix(session): route all Muse family models to the Meta system prompt (41581) - @OpeOginni: - fix(ui): correct OC-2 weak icon color (41504) - @peculiarnewbie: - feat(console): add go usage endpoint (16513) - @stevenao: - fix(opencode): detect Copilot PDF input support (41522) - @MatthewFeroz: - fix(provider): add Merge Gateway reasoning variants (41867) - @skyzhao1223: - docs: fix broken DigitalOcean and Daytona links (42048) - docs: fix provider display name and PAT typos (42034)

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