GPT-5.6 Sol vs Gemini 3.5 Flash: Release Comparison
Comparison of the GPT-5.6 Sol and Gemini 3.5 Flash releases: 6 and 3 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 9 models.
- For intelligence, GPT-5.6 Sol scores highest: GPT-5.6 Sol (max) at 61, against Gemini 3.5 Flash (high) at 52 for Gemini 3.5 Flash.
- For output speed, Gemini 3.5 Flash is fastest: Gemini 3.5 Flash (medium) at 189 t/s, against GPT-5.6 Sol (high) at 75 t/s for GPT-5.6 Sol.
- For cost per task, GPT-5.6 Sol is cheapest: GPT-5.6 Sol (low) at $0.18, against Gemini 3.5 Flash (high) at $0.69 for Gemini 3.5 Flash.
Releases compared
Intelligence
Artificial Analysis Intelligence Index
Intelligence Index vs. Cost per Intelligence Index Task
Cost
Cost per Intelligence Index Task
Speed & Latency
Output Speed
Capability Scores
Capability Indices
Measures performance in agentic workflows, focusing on behaviors like tool use, planning, autonomy, and complex problem solving.
Incorporates 5 evaluations: AA-Omniscience, GDPval-AA v2, Humanity's Last Exam, 𝜏³-Banking, AA-LCR · Higher is better
Incorporates 4 evaluations: AA-Omniscience, GDPval-AA v2, 𝜏³-Banking, AA-LCR · Higher is better
Incorporates 5 evaluations: AA-Omniscience, GDPval-AA v2, AA-LCR, 𝜏³-Banking, Humanity's Last Exam · Higher is better
Incorporates 5 evaluations: AA-Omniscience, GDPval-AA v2, MLCR-AA, Humanity's Last Exam, 𝜏³-Banking · Higher is better
Incorporates 6 evaluations: AA-Omniscience, Humanity's Last Exam, GPQA Diamond, CritPt, GDPval-AA v2, Terminal-Bench v2.1 · Higher is better
Incorporates 4 evaluations: AA-Omniscience, Humanity's Last Exam, GDPval-AA v2, AA-LCR · Higher is better
Further details
Weights | Provider Benchmarks | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| GPT-5.6 Sol (max) |  OpenAI | 61 | - | 1M | $3.1 | 74 | Not available |  | |
| GPT-5.6 Sol (xhigh) | OpenAI | 59 | - | 1M | $3.1 | 74 | Not available |  | |
| GPT-5.6 Sol (high) | OpenAI | 57 | - | 1M | $3.1 | 75 | Not available | | |
| GPT-5.6 Sol (medium) | OpenAI | 56 | - | 1M | $3.1 | 69 | Not available | | |
| Gemini 3.5 Flash (high) |  Google | 52 | - | 1M | $1.3 | 187 | Not available | | |
| GPT-5.6 Sol (low) | OpenAI | 51 | - | 1M | $3.1 | 69 | Not available | | |
| Gemini 3.5 Flash (medium) | Google | 47 | - | 1M | $1.3 | 189 | Not available | | |
| GPT-5.6 Sol (Non-reasoning) | OpenAI | 42 | - | 1M | $3.1 | 74 | Not available | | |
| Gemini 3.5 Flash (minimal) | Google | 36 | - | 1M | $1.3 | 179 | Not available | |