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Gemini 3.5 Flash vs GPT 6.1 Sol Pro

At a glance

Google's high-speed thinking model for agentic workflows, chat, and coding.

861.0M ctx$1.50/$9.00 per M#11/92

OpenAI's GPT-6.1 Sol served in pro reasoning mode for the hardest problems.

1.1M ctx$2.00/$10.00 per M
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
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-10-02
Cheaper16%
Capability
CapabilityECI86.2
Reasoning & Knowledge
Graduate Science92.8%Factual Recall66.2%
Math
Competition Math95.6%Research Math39.0%
Coding
Real-World Coding79.3%
Agentic
Novel Reasoning72.1%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Capability
Capability—
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—Research Math—
Coding
Real-World Coding—
Agentic
Novel Reasoning—
Specs
1.0M
Context
66K
Max output
May 2026
Released
1.1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input25%$1.50/M tokens
Output10%$9.00/M tokens
Reasoning$9.00/M tokens
Cache read$0.15/M tokens
Cache write97%$0.08/M tokens
Image input$1.50/M tokens
Audio input$3.00/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$2.00/M tokens
Output$10.00/M tokens
Cache read33%$0.10/M tokens
Cache write$2.50/M tokens
Web search29%$0.01/search
Chat with Gemini 3.5 FlashGo to model
Chat with GPT 6.1 Sol ProGo to model
Frequently Asked Questions: Gemini 3.5 Flash vs GPT 6.1 Sol Pro▼

Which is better, Gemini 3.5 Flash or GPT 6.1 Sol Pro?

▼

Both Gemini 3.5 Flash and GPT 6.1 Sol 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, Gemini 3.5 Flash or GPT 6.1 Sol Pro?

▼

Gemini 3.5 Flash has a lower blended cost. Gemini 3.5 Flash: $1.50 input / $9.00 output. GPT 6.1 Sol Pro: $2.00 input / $10.00 output.

Which has a larger context window, Gemini 3.5 Flash or GPT 6.1 Sol Pro?

▼

GPT 6.1 Sol Pro has a larger context window: Gemini 3.5 Flash supports 1M tokens vs GPT 6.1 Sol Pro at 1.1M tokens.

Do both Gemini 3.5 Flash and GPT 6.1 Sol Pro support vision?

▼

Yes, both Gemini 3.5 Flash and GPT 6.1 Sol Pro support vision/image input.

What are the key differences between Gemini 3.5 Flash and GPT 6.1 Sol Pro?

▼

Gemini 3.5 Flash and GPT 6.1 Sol Pro have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

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 Gemini 3.5 Flash and GPT 6.1 Sol Pro for free on idapt.app to see which performs better for your specific needs.

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