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GPT 6 Luna vs Gemini 3.1 Pro

At a glance

OpenAI's fastest, most affordable GPT-6 tier for high-volume, latency-sensitive work.

1.1M ctx$0.10/$0.50 per M

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
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-10-02
Cheaper96%
Capability
Capability—
Reasoning & Knowledge
Graduate Science90.5%Expert-Level—Factual Recall41.4%
Math
Competition Math3%98.9%Research Math—
Coding
Real-World Coding—
Agentic
Terminal Tasks—Novel Reasoning59.3%Task Horizon—
Reasoning
Sources:Epoch ECI·Epoch AI·Provider·OpenRouter· as of 2026-10-02
Capability
CapabilityECI86.4
Reasoning & Knowledge
Graduate Science4%94.4%Expert-Level46.4%Factual Recall78%73.5%
Math
Competition Math95.6%Research Math36.9%
Coding
Real-World Coding80.6%
Agentic
Terminal Tasks80.2%Novel Reasoning30%77.1%Task Horizon6.4h
Specs
1.1M
Context
128K
Max output
Sep 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
Input95%$0.10/M tokens
Output96%$0.50/M tokens
Cache read95%$0.01/M tokens
Cache write67%$0.13/M tokens
Web search29%$0.01/search
Live pricing, shown before you run
Input$2.00/M tokens
Output$12.00/M tokens
Reasoning$12.00/M tokens
Cache read$0.20/M tokens
Cache write$0.38/M tokens
Image input$2.00/M tokens
Audio input$2.00/M tokens
Web search$0.01/search
Chat with GPT 6 LunaGo to model
Chat with Gemini 3.1 ProGo to model
Frequently Asked Questions: GPT 6 Luna vs Gemini 3.1 Pro▼

Which is better, GPT 6 Luna or Gemini 3.1 Pro?

▼

Both GPT 6 Luna and Gemini 3.1 Pro are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, GPT 6 Luna or Gemini 3.1 Pro?

▼

GPT 6 Luna has a lower blended cost. GPT 6 Luna: $0.10 input / $0.50 output. Gemini 3.1 Pro: $2.00 input / $12.00 output.

Which has a larger context window, GPT 6 Luna or Gemini 3.1 Pro?

▼

GPT 6 Luna has a larger context window: GPT 6 Luna supports 1.1M tokens vs Gemini 3.1 Pro at 1M tokens.

Do both GPT 6 Luna and Gemini 3.1 Pro support vision?

▼

Yes, both GPT 6 Luna and Gemini 3.1 Pro support vision/image input.

What are the key differences between GPT 6 Luna and Gemini 3.1 Pro?

▼

Key differences: GPT 6 Luna 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 GPT 6 Luna and Gemini 3.1 Pro for free on idapt.app to see which performs better for your specific needs.

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