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GPT-5.5 vs Gemini 3.1 Pro
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Model vs model

GPT-5.5 vs Gemini 3.1 Pro

A debate-ready pair page: current winner, counter-case, decisive benchmarks, and the caveat that should travel with the claim.
Use case · Coding copilot
Winner · GPT-5.5
Evidence mode · Combined public record

GPT-5.5 leads this compare set for coding copilot.

Visible tradeoffs0 shared benchmarks are still tie-heavy, so the win stays conditional. This compare uses the combined public record, with hybrid receipts labeled separately.
Left caseGPT-5.5 wins 2 visible benchmarks · Coding
Right caseGemini 3.1 Pro wins 0 visible benchmarks · Reasoning / math / science · Long context
Traveling caveat0 shared benchmarks are still tie-heavy, so the win stays conditional. This compare uses the combined public record, with hybrid receipts labeled separately.
Debate surface0 shared benchmarks still read as tie-heavy.

GPT-5.5 case

  • Coding

Gemini 3.1 Pro case

  • Reasoning / math / science
  • Long context

What changes the outcome

  • GPT-5.5: 25 visible benchmark gaps still leave room for the result to move.
  • Gemini 3.1 Pro: 33 visible benchmark gaps still leave room for the result to move.

Why this result is surprising

  • The visible shared surface is more decisive than usual for this compare set.
  • HiL-Bench is doing a lot of the visible work in the public narrative.

Why this is not a clean win

  • 0 shared benchmarks are still tie-heavy, so the win stays conditional. This compare uses the combined public record, with hybrid receipts labeled separately.
  • Gemini 3.1 Pro remains the nearest counter-case once you change preset, mode, or missing-coverage assumptions.
Open full compare workspaceOpen compare artifactOpen controversy artifact
Share this artifact

Publish the claim after the evidence, not before it.

Keep the receipts page and card handy, then use the advanced framings only when you actually need them. Share stays available without becoming the page.

Compare artifactGPT-5.5 leads this compare set for coding copilot.

Runner-up: Gemini 3.1 Pro · 0 shared benchmarks are still tie-heavy, so the win stays conditional. This compare uses the combined public record, with hybrid receipts labeled separately.

Evidence page/versus/gpt-5-5/gemini-3-1-pro?preset=coding-copilot&mode=best-for-this-use-case
Card image/api/og?kind=compare&models=gpt-5-5,gemini-3-1-pro&mode=best-for-this-use-case&preset=coding-copilot
Public links

Open or copy the stable surfaces

The receipts page is the canonical evidence surface. The card image is the compact preview for embeds, screenshots, and social cards.

Open evidence pageOpen card preview
Copy-ready text

Use the exact public framing

Each copy action keeps the claim attached to receipts instead of forcing you into a blank composer.

Advanced framings and X composerNeutral, contrarian, open-model, and skeptical variants
Compare artifact

Pick the voice before you post

Use the framing variants only when you need them. The artifact page and the public copy actions above should handle most cases.

Neutral analystLead with the claim, then attach the reason and caveat.GPT-5.5 leads this compare set for coding copilot.
ContrarianPush against the easy read and keep the counter-case live.Contrarian take: GPT-5.5 leads this compare set for coding copilot.
Open-model angleBias the framing toward the open-weight or transparent-evidence angle.Open-model angle: Compare artifact · GPT-5.5 vs Gemini 3.1 Pro
Don't trust the headlineLead with the caveat before you let the claim travel.Don't trust the headline: Compare artifact · GPT-5.5 vs Gemini 3.1 Pro
X composer

Compose a post that keeps the caveat attached

The post shell always exposes the headline, why, caveat, receipts link, and an optional reply-bait angle.

HeadlineGPT-5.5 leads this compare set for coding copilot.
WhySL · spread 60.0 · %
Caveat0 shared benchmarks are still tie-heavy, so the win stays conditional. This compare uses the combined public record, with hybrid receipts labeled separately.
Receipts link/versus/gpt-5-5/gemini-3-1-pro?preset=coding-copilot&mode=best-for-this-use-case
Reply-bait angleIf you still back Gemini 3.1 Pro, which benchmark or judge weighting should outrank this surface?
PreviewOver 280
GPT-5.5 leads this compare set for coding copilot.
SL · spread 60.0 · %
Caveat: 0 shared benchmarks are still tie-heavy, so the win stays conditional. This compare uses the combined public record, with hybrid receipts labeled separately.
Receipts: /versus/gpt-5-5/gemini-3-1-pro?preset=coding-copilot&mode=best-for-this-use-case
Reply bait: If you still back Gemini 3.1 Pro, which benchmark or judge weighting should outrank this surface?
Open in XOpen card preview

Decisive benchmarks

bench
HiL-Bench

GPT-5.5 has the cleanest edge here.

bench
Search Arena

GPT-5.5 has the cleanest edge here.

2 of 40 benchmarks
HiL-Bench
SL · %
Code · Coding
29.1%100%
20.3%40%
60% spread
Search Arena
AR · rating
Search · Search / tool use
1,23596.3%
1,21885.2%
11.1% spread