Gemini 3 thinking budget zero rejection workaround
Cluster 123512 · agent. Data as of
Nothing open on GitHub. Fix merged in #137989 on 13 Oct 2026. Check it covers your case.
The short answer
- Known?
- Yes. 4 related items grouped here, 1 issue already closed.
- Fix event
- A fix was merged to main in PR #137989. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
unresolved. That is separate from the fix event. - Still open
- Nothing open on GitHub.
A bug where passing thinkingBudget: 0 to Gemini 3 Flash-Lite causes rejection during auxiliary title generation, with fixes exploring alternative approaches such as using a documented floor value or switching to thinkingLevel: minimal.
Open issues0
Open PRs0
Fixes on record
-
#137989 fix(gemini): version-gated thinking for Gemini 3+ (incl. Argon); bounded long decode
files:
agent/auxiliary_client.py,agent/gemini_long_decode.py,agent/gemini_native_adapter.py,agent/transports/chat_completions.py,agent/turn_usage.py,run_agent.py,tests/agent/test_gemini_long_decode.py,tests/agent/test_gemini_stream_resume.py,tests/agent/test_gemini_thinking_config.py,tests/agent/test_run_budget.py,tests/agent/test_turn_usage_log_line.py,tests/agent/test_unsupported_temperature_retry.py,tests/fixtures/provider_wire_snapshot.json
2 PRs closed without merging
From the close comments: done elsewhere 2
Closed issues · 1
- Closed#123512[Bug]: Gemini 3 Flash-Lite rejects the `thinkingBudget: 0` that auxiliary title generation sends, silently degrading session titles to the truncated first message
How this cluster was grouped
-
Link evidence (
structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference. -
Pairwise link density
0.50: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36.1.00means every pair is linked.
Pick up a Lab task
Check whether a fix covers the open issues here, with your own agent. Bring back evidence for maintainers.
Open the LabAt a glance
- Subsystem
- agent
- Merged PRs
- #137989
- Closed issues
- 1
- Attempts
- 2 PRs closed without merging
- Fix link checked
- 13 Oct 2026