Perplexity API stops working with "invalid request" error

[TheNetos]

Description

First of all, thanks for opencode, it's great!

Today, around 10 AM UTC, i started getting errors when making requests to the OpenAI, Anthropic, and Gemini models via the perplexity API:
invalid request: invalid tools in request: custom function name "..." is reserved

All responses from these models are in the screenshot below.

On logs is see errors (this is the first one):

timestamp=2026-06-29T10:19:21.039Z level=ERROR run=804a9322 message="stream error" providerID=perplexity-openai modelID=anthropic/claude-opus-4-8 session.id=ses_0ed1bfe5affefPZ39BHWQ01u5s small=false agent=plan mode=primary error.error="AI_APICallError: invalid request: invalid tools in request: custom function name \"bash\" is reserved"
timestamp=2026-06-29T10:19:21.042Z level=ERROR run=804a9322 message=process session.id=ses_0ed1bfe5affefPZ39BHWQ01u5s messageID=msg_f12e401bc002g9aQ6JirOMbvFr error="invalid request: invalid tools in request: custom function name \"bash\" is reserved" stack="AI_APICallError: invalid request: invalid tools in request: custom function name \"bash\" is reserved\n    at <anonymous> (/$bunfs/root/chunk-dwvrcch0.js:6:14583)\n    at async <anonymous> (/$bunfs/root/chunk-dwvrcch0.js:6:12790)\n    at processTicksAndRejections (native:7:39)"

Before that - all works good.

Plugins

None

OpenCode version

1.17.11

Steps to reproduce

1. Setup perplexity-agent API by instructions
2. Write smth
3. ...

Screenshot and/or share link

Anthropic > OpenAI > Gemini

Operating System

macOS 26.5

Terminal

iTerm2

[w3nash]

experiencing this today too

[w3nash]

Upgraded to 1.17.13.

I no longer see the custom function name "bash" is reserved error, but I don't think it's actually fixed — requests now fail earlier with a different error:

invalid request body: json: unknown field "summary"

Full log:

timestamp=2026-07-01T18:25:58.646Z level=ERROR run=f5550638 message="stream error" providerID=perplexity-agent modelID=google/gemini-3-flash-preview session.id=ses_0e111c070ffe3uzLdbNUeLv0pX small=true agent=title mode=primary error.error="AI_APICallError: invalid request body: json: unknown field \"summary\""
timestamp=2026-07-01T18:25:59.178Z level=ERROR run=f5550638 message="stream error" providerID=perplexity-agent modelID=anthropic/claude-opus-4-8 session.id=ses_0e111c070ffe3uzLdbNUeLv0pX small=false agent=build mode=primary error.error="AI_APICallError: invalid request body: json: unknown field \"summary\""
timestamp=2026-07-01T18:25:59.182Z level=ERROR run=f5550638 message=process session.id=ses_0e111c070ffe3uzLdbNUeLv0pX messageID=msg_f1eee3fb60016RVzf9nhM5ESRS error="invalid request body: json: unknown field \"summary\"" stack="AI_APICallError: invalid request body: json: unknown field \"summary\"\n    at <anonymous> (/$bunfs/root/chunk-bfez4scf.js:6:14583)\n    at async <anonymous> (/$bunfs/root/chunk-bfez4scf.js:6:12790)\n    at processTicksAndRejections (native:7:39)"

Affects both anthropic/claude-opus-4-8 and google/gemini-3-flash-preview through the same perplexity-agent provider.

This coincides with #34702 (merged just before the 1.17.13 release), which makes opencode force a reasoning.summary field into requests for custom OpenAI-compatible providers like this one. That's a new field this gateway apparently doesn't accept, and its strict validation seems to reject the request before it would ever reach whatever check previously flagged bash as reserved. So this still looks like the same underlying incompatibility — just a different, earlier validation failure masking it now.