Models · Google (Gemini / DeepMind) · Out sinceReleased 25 Feb 2026

Gemini 3.1 Pro Preview Custom Tools

Available on OpenRouterOn OpenRouterAvailable nowGenerally availableClosed (can't be downloaded)Proprietary

Gemini 3.1 Pro Preview Custom Tools is made by Google (Gemini / DeepMind). We don't have enough test results yet to rank it. It's mid-priced to use.

Auto-created from OpenRouter catalog; verify details.

Writing & creativity: —
Research & analysis: —
Coding: —
Price: Mid-priced$2 / $12
Price per 1M (blended)Blended / 1M: $4.50
MemoryContext: 1M
Longest answerMax output: —
Test resultsResults: 1 (1 independent1 indep.)
Out sinceReleased: 25 Feb 2026
Made byVendor: Google (Gemini / DeepMind)
UnderstandsInputs: —

Scores are out of 100 for each area, compared with every model we track; “#” is its rank. Context is how much text it can read at once (1M is roughly 700,000 words). Blended price mixes the cost of what you send and what it writes back.

Thinking levels

Reasoning settings

You can't choose how long this one thinks.

No adjustable reasoning setting listed.

Links

Using it through OpenRouter

On OpenRouter

OpenRouter is a service that gives access to many AI models in one place. This model is listed there as google/gemini-3.1-pro-preview-customtools.

Route it as google/gemini-3.1-pro-preview-customtools at $2 in / $12 out per 1M tokens, 1M context. Listed since 25 Feb 2026.

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstemperaturetool_choicetoolstop_p

Every test result

Every result

All the numbers,with where they came from.

Every result we've found for this model, with who measured it and a link to where we read it.

All raw rows (vendor and independent kept separate), with setting label, source, date, harness and notes.

All results for this model
						NotesNotes
SWE-bench Verified	75.6%	Defaultgemini-3.1-pro-preview-customtools	Independent testIndependentEpoch AI ↗	24 Feb 2026	—	Epoch-run SWE-bench Verified (Epoch scaffold); no runs after 2026-06; stderr 2.0pt; data https://epoch.ai/data/benchmark_data.zip (swe_bench_verified.csv)