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Head-to-head comparison

Gemini 3.7 Flash vs GPT-5.5

Gemini 3.7 Flash (Google) and GPT-5.5 (OpenAI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 17 August 2026

As of 17 August 2026, GPT-5.5 holds the stronger ModelCap Index position (#8 vs #14); and Gemini 3.7 Flash is 16× cheaper per output token ($1.88/1M vs $30.00/1M).

Which should you choose?

Choose Gemini 3.7 Flash if…

  • API cost matters — $1.88/1M output tokens against $30.00/1M, about 16× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.375/1M against $5.00/1M.
  • you want the more recently listed model — Gemini 3.7 Flash was listed 13 August 2026, GPT-5.5 24 April 2026.

Choose GPT-5.5 if…

  • you want the stronger overall ModelCap Index position — #8 against #14 (76.9 vs 73.1 points).
  • you want provider choice — 3 listed API providers against 2.
  • LMArena Agent is your yardstick — 8.9% against 3.6%.
  • Artificial Analysis Intelligence Index is your yardstick — 56.3 against 56.0.

Gemini 3.7 Flash vs GPT-5.5: specs, pricing and context

Specification comparison of Gemini 3.7 Flash and GPT-5.5
FieldGemini 3.7 FlashGoogleGPT-5.5OpenAI
ModelCap Index position#14#8
Index score73.176.9
EvidenceMeasuredMeasured
Input price / 1M tokens$0.375$5.00
Output price / 1M tokens$1.88$30.00
Context window1M tokens1M tokens
Max output tokens66K128K
API providers listed23
Weight accessAPI onlyAPI only
Input modalitiesText, Image, Video, File, AudioFile, Image, Text
First listed13 August 202624 April 2026
PublisherGoogleOpenAI

Evidence: 2 public benchmark observations across 2 boards · 6 public benchmark observations across 6 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Gemini 3.7 Flash vs GPT-5.5

Public benchmark boards where Gemini 3.7 Flash or GPT-5.5 has a published result
BoardGemini 3.7 FlashGPT-5.5Leads
Arena codingArena (LMArena)—15201513–1526HighOnly one result
LMArena AgentLMArena3.6%2.4%–4.8%High8.9%7.9%–9.9%X-HighGPT-5.5
ARC-AGI-2ARC Prize Foundation—85.0%X-HighOnly one result
ARC-AGI-3ARC Prize Foundation—0.4%HighOnly one result
Artificial Analysis Intelligence IndexArtificial Analysis56.0intelligence-index56.3intelligence-indexGPT-5.5

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Gemini 3.7 Flash vs GPT-5.5: common questions

Is Gemini 3.7 Flash better than GPT-5.5?

GPT-5.5 ranks higher on the ModelCap Index as of 17 August 2026: #8 against #14. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it.

Is Gemini 3.7 Flash cheaper than GPT-5.5?

Gemini 3.7 Flash is cheaper on output tokens: $1.88/1M against $30.00/1M. Input tokens are $0.375/1M for Gemini 3.7 Flash and $5.00/1M for GPT-5.5. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Gemini 3.7 Flash or GPT-5.5?

Both publish a 1M-token context window.

Which is better for coding, Gemini 3.7 Flash or GPT-5.5?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Gemini 3.7 Flash and GPT-5.5 open-weight models?

Gemini 3.7 Flash: API only. GPT-5.5: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Gemini 3.7 Flash and GPT-5.5?

ModelCap currently lists 2 API providers for Gemini 3.7 Flash and 3 for GPT-5.5, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Gemini 3.7 Flash vs GPT-5.5 comparison?

Every figure comes from the sealed ModelCap dataset published 17 August 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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