GPT-5.6 Luna leads overall
Ahead on 4 of 4 benchmarks, averaging 26.1 points higher
Summarised from the 4 benchmarks both models were scored on; details in the charts below. A further 2 Elo/rating-scale benchmarks are left out of the average — their scale cannot be added to percentages.

Gemini 3.5 Flash-Lite
Google Deep Mind
Updates live with the mode filters below.
Best overall
GPT-5.6 Luna · 587.76
Best single
GPT-5.6 Luna · Creative Writing 1826.60
Modality coverage
Gemini 3.5 Flash-Lite · 4 modalities
Head to head
6
Benchmarks
0
Wins
6
Losses
-182.96
Average diff
Benchmark-by-benchmark comparison. Changing the thinking mode or tool filters updates the chart and table below.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
Each axis is the mean percentage score of one benchmark domain. It is an average, not a capability rating.
Relative edge: none clear / Relative gap: 数学推理 -28.4
Relative edge: 数学推理 +28.4 / Relative gap: none clear
Method: for each model and benchmark, all scores in the current mode scope are averaged (not the best score), then those benchmark scores are averaged within each domain. Only benchmarks scored on a 0-100 scale by at least two of the selected models count — Elo and rating-scale benchmarks such as Codeforces or Arena are excluded, because averaging a 1500 rating with an 85% accuracy produces a meaningless number. Missing values are not counted as zero, and the averages are unweighted, so domains with harder benchmarks read lower.
Every model and runtime mode, benchmark by benchmark. Values are comparable along a row, not between different benchmarks.
6 benchmarks with comparable scores. Each model shows its best score; mode label is displayed below.
| Benchmark | Gemini 3.5 Flash-Lite | GPT-5.6 Luna |
|---|---|---|
GPQA Diamond 科学与综合推理 | 83.33Thinking Level · High | 91.60Thinking Level · High |
Creative Writing 写作和创作 | 1556.00Standard Mode | 1826.60Standard Mode |
Context Arena 文本向量检索 | 72.57Thinking Level · High | 81.80Thinking Level · High |
Terminal-Bench 2.1 AI Agent - 工具使用 | 54.00Thinking Enabled | Tools | 84.70Thinking Level · High |
AA-Briefcase 生产力知识 | 636.95Thinking Enabled | Tools | 1359.76Thinking Level · High | Tools |
FrontierMath v2 数学推理 | 25.96Thinking Level · High | 82.11Thinking Level · High |
Official list prices per model API, split by input and output. Unit: USD per 1M tokens.
Architecture, licensing and API modalities. "Not provided" means the field is missing from our database.
| Features & specs | Gemini 3.5 Flash-LiteGoogle Deep Mind | GPT-5.6 LunaOpenAI |
|---|---|---|
Core specsRelease | 2026-07-21 | 2026-06-26 |
Context length | 1M | 1.05M |
Max output length | 65,536 tokens | 128,000 tokens |
Architecture | Dense | Dense |
Runtime modes | 低中高 | 中关闭低高 |
LicenseCode Open Source | Closed Source | Closed Source |
Weights Open Source | Closed Source | Closed Source |
Licensing status | 不开源 | 不开源 |
API modality supportText Input/Output | / | / |
Image Input/Output | / | / |
Audio Input/Output | / | Not provided |
Video Input/Output | / | Not provided |
ResourcesPaper / report | Gemini 3.5 Flash-Lite | Previewing GPT-5.6 Sol: a next-generation model |

GPT-5.6 Luna
OpenAI