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Claude Opus 4.8 vs Gemini 3.1 Pro

At a glance

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
Agent Demos
All agent demos

No shared agent demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
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 Science3%94.1%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
1M
Context
128K
Max output
May 2026
Released
1.0M
Context
66K
Max output
Feb 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
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 search29%$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 Claude Opus 4.8Go to model
Chat with Gemini 3.1 ProGo to model
Frequently Asked Questions: Claude Opus 4.8 vs Gemini 3.1 Pro▼

Which is better, Claude Opus 4.8 or Gemini 3.1 Pro?

▼

Based on the Capability Index, Claude Opus 4.8 scores higher (89.2 vs 86.4). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, Claude Opus 4.8 or Gemini 3.1 Pro?

▼

Gemini 3.1 Pro has a lower blended cost. Claude Opus 4.8: $5.00 input / $25.00 output. Gemini 3.1 Pro: $2.00 input / $12.00 output.

Which has a larger context window, Claude Opus 4.8 or Gemini 3.1 Pro?

▼

Gemini 3.1 Pro has a larger context window: Claude Opus 4.8 supports 1M tokens vs Gemini 3.1 Pro at 1M tokens.

Do both Claude Opus 4.8 and Gemini 3.1 Pro support vision?

▼

Yes, both Claude Opus 4.8 and Gemini 3.1 Pro support vision/image input.

Which has better coding performance, Claude Opus 4.8 or Gemini 3.1 Pro?

▼

Claude Opus 4.8 scores higher on SWE-bench Verified: Claude Opus 4.8 resolves 89% vs Gemini 3.1 Pro at 81%.

What are the key differences between Claude Opus 4.8 and Gemini 3.1 Pro?

▼

Key differences: Gemini 3.1 Pro is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Opus 4.8 and Gemini 3.1 Pro for free on idapt.app to see which performs better for your specific needs.

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