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GPT 5 Nano vs Gemini 3.5 Flash

At a glance

Ultra-fast and lightweight GPT-5 variant for low-latency tasks.

73400K ctx$0.05/$0.40 per M#48/92

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
CodingInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper96%
Capability
CapabilityECI73.4
Reasoning & Knowledge
Graduate Science69.4%Factual Recall12.2%
Math
Math Problems95.2%Competition Math81.1%Research Math8.3%
Coding
Real-World Coding—
Agentic
Terminal Tasks11.5%Novel Reasoning2.6%
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter17%
Capability
CapabilityECI17%86.2
Reasoning & Knowledge
Graduate Science34%92.8%Factual Recall461%68.4%
Math
Math Problems—Competition Math18%95.6%Research Math371%39.0%
Coding
Real-World Coding79.3%
Agentic
Terminal Tasks—Novel Reasoning2662%72.1%
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
Input97%$0.05/M tokens
Output96%$0.40/M tokens
Cache read97%$0.005/M tokens
Web search29%$0.01/search
Live pricing, shown before you run
Input$1.50/M tokens
Output$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 5 NanoGo to model
Chat with Gemini 3.5 FlashGo to model
Frequently Asked Questions: GPT 5 Nano vs Gemini 3.5 Flash▼

Which is better, GPT 5 Nano or Gemini 3.5 Flash?

▼

Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 73.4). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, GPT 5 Nano or Gemini 3.5 Flash?

▼

GPT 5 Nano has a lower blended cost. GPT 5 Nano: $0.05 input / $0.40 output. Gemini 3.5 Flash: $1.50 input / $9.00 output.

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

▼

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

Do both GPT 5 Nano and Gemini 3.5 Flash support vision?

▼

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

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

▼

Key differences: Gemini 3.5 Flash has a notably higher capability index (12.8 point gap); GPT 5 Nano 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 5 Nano and Gemini 3.5 Flash for free on idapt.app to see which performs better for your specific needs.

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