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GPT 5 Mini vs Gemini 3.5 Flash

At a glance

Compact GPT-5 variant balancing speed and intelligence.

78400K ctx$0.25/$2.00 per M#33/92

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
Cheaper80%
Capability
CapabilityECI78.0
Reasoning & Knowledge
Graduate Science75.0%Factual Recall21.0%
Math
Math Problems97.8%Competition Math86.7%Research Math27.2%
Coding
Real-World Coding64.7%
Agentic
Terminal Tasks31.9%Novel Reasoning4.4%
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter11%
Capability
CapabilityECI11%86.2
Reasoning & Knowledge
Graduate Science24%92.8%Factual Recall226%68.4%
Math
Math Problems—Competition Math10%95.6%Research Math43%39.0%
Coding
Real-World Coding23%79.3%
Agentic
Terminal Tasks—Novel Reasoning1523%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
Input83%$0.25/M tokens
Output78%$2.00/M tokens
Cache read83%$0.02/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 MiniGo to model
Chat with Gemini 3.5 FlashGo to model
Frequently Asked Questions: GPT 5 Mini vs Gemini 3.5 Flash▼

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

▼

Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 78.0). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

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

▼

GPT 5 Mini has a lower blended cost. GPT 5 Mini: $0.25 input / $2.00 output. Gemini 3.5 Flash: $1.50 input / $9.00 output.

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

▼

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

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

▼

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

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

▼

Gemini 3.5 Flash scores higher on SWE-bench Verified: GPT 5 Mini resolves 65% vs Gemini 3.5 Flash at 79%.

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

▼

Key differences: Gemini 3.5 Flash has a notably higher capability index (8.2 point gap); GPT 5 Mini 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 Mini and Gemini 3.5 Flash for free on idapt.app to see which performs better for your specific needs.

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