Go: 5-hour usage limit blocks all models after one model hits its own limit

Description

Summary

After grok-4.6 hit its own 5-hour usage limit, every other OpenCode Go model
with zero usage started returning the same "5-hour usage limit reached" error,
with the same rolling reset window. Switching models does not help.

Environment

• opencode 1.18.30
• OS: Windows (win32)
• Provider: opencode-go
• Workspace: wrk_01M253ZBQ65WYRCXEEQE0SVV17

Expected

Per docs (https://opencode.ai/docs/go/), usage limits are per-model
(5h = 20% of that model's monthly limit). GLM-5.3, DeepSeek, Kimi etc. had
zero usage, so they should remain usable.

Actual

grok-4.6 is the only model with spend ($3.17, its 5h cap is $3.00) — legitimately
blocked. But all other models return the identical error with the same countdown,
across separate sessions and even for tiny title-generation requests.

Console usage page shows grok-4.6 only; every other model = $0.

Steps to reproduce

1. Use grok-4.6 until its 5h limit is reached.
2. Switch to glm-5.3 / deepseek-v4.1-flash / kimi-k3 (all $0 usage).
3. Send any request (new session, minimal prompt).
4. Same error: "5-hour usage limit reached. Resets in X".

Log evidence (opencode.log, 2026-09-14)

Different models, same error and same rolling reset window:

• 15:49 grok-4.6 (subagent)
• 16:16 muse-spark-1.2-contributor
• 16:17 / 16:25 glm-5.3
• 16:21 deepseek-v4.1-flash
• 16:31 kimi-k3 (new session) + title generation

Attached: log excerpts + console screenshot.

Impact

Paid models unusable for the remainder of the window, despite per-model
allowances by design.

Plugins

No response

OpenCode version

1.18.30

Steps to reproduce

No response

Screenshot and/or share link

<img width="1192" height="722" alt="

go_limit_evidence.txt

Image" src="https://github.com/user-attachments/assets/1a4ea3fb-58d8-42ec-81b8-e1bce89b52f1" />

Operating System

Windows 11

Terminal

OpenCode

Start with the opencode-go provider path and the usage-limit behavior described in the issue. Compare requests for grok-4.6 with zero-usage models using the attached opencode.log evidence and console usage page. Done means one model reaching its 5-hour limit no longer blocks other models with unused allowances.