# opencode v1.18.17

- Product: opencode (https://whatsnew.fyi/product/opencode)
- Vendor: anomalyco
- Date: 2026-08-12
- Version: v1.18.17
- Original notes: https://github.com/anomalyco/opencode/releases/tag/v1.18.17
- Permalink: https://whatsnew.fyi/product/opencode/releases/v1.18.17

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Session compaction now keeps complete recent turns and produces clearer summaries for smaller models
- **added** — Added MERGE Gateway reasoning variants so those model options work correctly
- **fixed** — Capped automatic session retries and added jitter to reduce repeated retry storms
- **added** — Enabled PDF attachments for GitHub Copilot models that advertise PDF vision support
- **fixed** — Applied the correct sampling defaults to DeepSeek V4 Flash on supported providers
- **fixed** — Routed all Muse family models to the correct Meta system prompt
- **changed** — Updated Chinese developer terminology to use more widely recognized translations
- **fixed** — Used the server's current default model instead of stale local config when choosing the default model

##### 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)