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GPT 5.6 Sol vs Claude Opus 4.8 vs Gemini 3.1 Pro

The big three, in aligned columns. Each column carries the model's capability index, named benchmarks, specs, and list prices; the output band runs the same prompt across all three so you can judge tone and reasoning yourself.Last reviewed 2026-07-17.

GPT 5.6 Sol vs Claude Opus 4.8 vs Gemini 3.1 Pro

At a glance

OpenAI's GPT-5.6 flagship — built for complex reasoning, agentic coding, and long-running professional work.

1.1M ctx$5.00/$30.00 per M

Anthropic's most capable Opus yet, built for long-horizon autonomous agents and frontier coding.

891M ctx$5.00/$25.00 per M#4/92

Google's frontier model with a large leap in core reasoning.

861.0M ctx$2.00/$12.00 per M#10/92
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
The paired significance test (McNemar, in "Measured on Idapt") appears only when exactly two models are pinned.
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Capability
Capability—
Reasoning & Knowledge
Graduate Science1%94.6%Expert-Level—Factual Recall—
Math
Competition Math—Research Math—
Coding
Real-World Coding—
Agentic
Terminal Tasks11%88.8%Novel Reasoning—Task Horizon—
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·Provider·OpenRouter· as of 2026-07-10
Smarter3%
Capability
CapabilityECI3%89.2
Reasoning & Knowledge
Graduate Science91.0%Expert-Level—Factual Recall39.5%
Math
Competition Math3%98.3%Research Math28%47.2%
Coding
Real-World Coding10%88.6%
Agentic
Terminal Tasks—Novel Reasoning72.1%Task Horizon—
Reasoning
Sources:Epoch ECI·Epoch AI·Provider·OpenRouter· as of 2026-07-10
Cheaper55%
Capability
CapabilityECI86.4
Reasoning & Knowledge
Graduate Science94.1%Expert-Level46.4%Factual Recall96%77.3%
Math
Competition Math95.6%Research Math36.9%
Coding
Real-World Coding80.6%
Agentic
Terminal Tasks80.2%Novel Reasoning7%77.1%Task Horizon6.4h
Specs
1.1M
Context
128K
Max output
Jul 2026
Released
1M
Context
128K
Max output
May 2026
Released
1.0M
Context
66K
Max output
Feb 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$5.00/M tokens
Output$30.00/M tokens
Cache read$0.50/M tokens
Cache write$6.25/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$5.00/M tokens
Output$25.00/M tokens
Cache read$0.50/M tokens
Cache write$6.25/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input60%$2.00/M tokens
Output52%$12.00/M tokens
Reasoning$12.00/M tokens
Cache read60%$0.20/M tokens
Cache write94%$0.38/M tokens
Image input$2.00/M tokens
Audio input$2.00/M tokens
Web search$0.01/search
Chat with GPT 5.6 SolGo to model
Chat with Claude Opus 4.8Go to model
Chat with Gemini 3.1 ProGo to model

Frequently asked

Which of GPT 5.6 Sol, Claude Opus 4.8, and Gemini 3.1 Pro is the cheapest?

Gemini 3.1 Pro has the lowest blended list price. Per 1M tokens: GPT 5.6 Sol at $5.00 in / $30.00 out; Claude Opus 4.8 at $5.00 in / $25.00 out; Gemini 3.1 Pro at $2.00 in / $12.00 out.

Which of GPT 5.6 Sol, Claude Opus 4.8, and Gemini 3.1 Pro has the largest context window?

GPT 5.6 Sol leads with 1.1M tokens. The other two: Claude Opus 4.8 at 1M, Gemini 3.1 Pro at 1M.

Do GPT 5.6 Sol, Claude Opus 4.8, and Gemini 3.1 Pro support image input?

Yes, all three accept images.

Where can I run GPT 5.6 Sol, Claude Opus 4.8, and Gemini 3.1 Pro side by side?

This idapt comparison runs all three in aligned columns: the same prompt, plus benchmarks, specs, and prices per model. Open any model in chat from its column to keep working with it.

More three-way comparisons

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