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GPT 5 vs Gemini 3.5 Flash

At a glance

OpenAI's powerful general-purpose frontier model.

82400K ctx$1.25/$10.00 per M#20/92

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

861.0M ctx$1.50/$9.00 per M#11/92
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
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI81.8
Reasoning & Knowledge
Graduate Science86.2%Expert-Level25.3%Factual Recall50.6%
Math
Math Problems98.1%Competition Math91.4%Research Math32.4%
Coding
Real-World Coding73.6%Code Editing88.0%
Agentic
Terminal Tasks49.6%Novel Reasoning9.9%Task Horizon3.4h
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter5%Cheaper2%
Capability
CapabilityECI5%86.2
Reasoning & Knowledge
Graduate Science8%92.8%Expert-Level—Factual Recall35%68.4%
Math
Math Problems—Competition Math5%95.6%Research Math20%39.0%
Coding
Real-World Coding8%79.3%Code Editing—
Agentic
Terminal Tasks—Novel Reasoning631%72.1%Task Horizon—
Specs
400K
Context
128K
Max output
Aug 2025
Released
1.0M
Context
66K
Max output
May 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input17%$1.25/M tokens
Output$10.00/M tokens
Cache read17%$0.13/M tokens
Web search29%$0.01/search
Live pricing, shown before you run
Input$1.50/M tokens
Output10%$9.00/M tokens
Reasoning$9.00/M tokens
Cache read$0.15/M tokens
Cache write$0.08/M tokens
Image input$1.50/M tokens
Audio input$3.00/M tokens
Web search$0.01/search
Chat with GPT 5Go to model
Chat with Gemini 3.5 FlashGo to model
Frequently Asked Questions: GPT 5 vs Gemini 3.5 Flash▼

Which is better, GPT 5 or Gemini 3.5 Flash?

▼

Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 81.8). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, GPT 5 or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash has a lower blended cost. GPT 5: $1.25 input / $10.00 output. Gemini 3.5 Flash: $1.50 input / $9.00 output.

Which has a larger context window, GPT 5 or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash has a larger context window: GPT 5 supports 400K tokens vs Gemini 3.5 Flash at 1M tokens.

Do both GPT 5 and Gemini 3.5 Flash support vision?

▼

Yes, both GPT 5 and Gemini 3.5 Flash support vision/image input.

Which has better coding performance, GPT 5 or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash scores higher on SWE-bench Verified: GPT 5 resolves 74% vs Gemini 3.5 Flash at 79%.

What are the key differences between GPT 5 and Gemini 3.5 Flash?

▼

GPT 5 and Gemini 3.5 Flash 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 GPT 5 and Gemini 3.5 Flash for free on idapt.app to see which performs better for your specific needs.

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