Gemini 3.5 FlashvsGPT-5.5
Across 6 shared benchmarks, GPT-5.5 leads overall: Gemini 3.5 Flash wins 1, GPT-5.5 wins 5, with 0 ties and an average score difference of -3.96.
Gemini 3.5 Flash
Google Deep Mind · 2026-06-20 · Multimodal model
GPT-5.5
OpenAI · 2026-04-23 · Reasoning model
Gemini 3.5 Flash1 win(17%)(83%)5 winsGPT-5.5
Benchmark scores
Grouped by capability, sorted by largest gap within each. 6 shared benchmarks.
AI Agent - Tool Usage
GPT-5.5 2/2| Benchmark | Gemini 3.5 Flash | GPT-5.5 | Diff |
|---|---|---|---|
| Terminal-Bench 2.1 | 76.2031 / 53Thinking High (With Tools) | 83.4020 / 53Thinking High (With Tools) | -7.20 |
| OSWorld-Verified | 78.4010 / 26Thinking High (With Tools) | 78.709 / 26Thinking High (With Tools) | -0.30 |
Coding and Software Engineer
GPT-5.5 1/1| Benchmark | Gemini 3.5 Flash | GPT-5.5 | Diff |
|---|---|---|---|
| SWE-Bench Pro - Public | 55.1033 / 62Thinking High (With Tools) | 58.6018 / 62Thinking High (With Tools) | -3.50 |
Commonsense Reasoning
Gemini 3.5 Flash 1/1| Benchmark | Gemini 3.5 Flash | GPT-5.5 | Diff |
|---|---|---|---|
| SimpleBench | 76.7010 / 93Normal (No Tools) | 6918 / 93Normal (No Tools) | +7.70 |
General Knowledge
GPT-5.5 1/1| Benchmark | Gemini 3.5 Flash | GPT-5.5 | Diff |
|---|---|---|---|
| HLE | 40.2076 / 197Thinking High (With Tools) | 52.2028 / 197Thinking High (With Tools) | -12 |
Text Embedding
GPT-5.5 1/1| Benchmark | Gemini 3.5 Flash | GPT-5.5 | Diff |
|---|---|---|---|
| Context Arena | 33.49109 / 126Normal (No Tools) | 41.9398 / 126Normal (No Tools) | -8.44 |
Specs
| Field | Gemini 3.5 Flash | GPT-5.5 |
|---|---|---|
| Publisher | Google Deep Mind | OpenAI |
| Release date | 2026-06-20 | 2026-04-23 |
| Model type | Multimodal model | Reasoning model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1M | 1000K |
| Max output | 64K | 128K |
API pricing
Prices use DataLearner records when available; missing fields are not inferred.
| Item | Gemini 3.5 Flash | GPT-5.5 |
|---|---|---|
| Text input | $1.5 / 1M tokens | $5 / 1M tokens |
| Text output | $9 / 1M tokens | $30 / 1M tokens |
| Cache read | $0.15 / 1M tokens | $0.5 / 1M tokens |
| Cache write | Not public | $6.25 / 1M tokens |
Summary
- Gemini 3.5 Flashleads in:Commonsense Reasoning (1/1)
- GPT-5.5leads in:AI Agent - Tool Usage (2/2), Coding and Software Engineer (1/1), General Knowledge (1/1), Text Embedding (1/1)
On average across the 6 shared benchmarks, GPT-5.5 scores 3.96 higher.
Largest single-benchmark gap: HLE — Gemini 3.5 Flash 40.20 vs GPT-5.5 52.20 (-12).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.