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Gemini 2.5 Pro (05-06) vs Gemini 3.5 Flash

At a glance

Earlier Gemini 2.5 Pro preview release from May 2025.

751.0M ctx$1.25/$10.00 per M#41/92

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
AgenticInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI75.3
Reasoning & Knowledge
Graduate Science66.7%Expert-Level17.8%Factual Recall—
Math
Math Problems95.9%Competition Math—Research Math—
Coding
Real-World Coding—Code Editing76.9%
Agentic
Novel Reasoning—
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Smarter14%Cheaper2%
Capability
CapabilityECI14%86.2
Reasoning & Knowledge
Graduate Science39%92.8%Expert-Level—Factual Recall68.4%
Math
Math Problems—Competition Math95.6%Research Math39.0%
Coding
Real-World Coding79.3%Code Editing—
Agentic
Novel Reasoning72.1%
Specs
1.0M
Context
66K
Max output
May 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
Reasoning$10.00/M tokens
Cache read17%$0.13/M tokens
Cache write$0.38/M tokens
Image input17%$1.25/M tokens
Audio input58%$1.25/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input$1.50/M tokens
Output10%$9.00/M tokens
Reasoning10%$9.00/M tokens
Cache read$0.15/M tokens
Cache write78%$0.08/M tokens
Image input$1.50/M tokens
Audio input$3.00/M tokens
Web search$0.01/search
Chat with Gemini 2.5 Pro (05-06)Go to model
Chat with Gemini 3.5 FlashGo to model
Frequently Asked Questions: Gemini 2.5 Pro (05-06) vs Gemini 3.5 Flash▼

Which is better, Gemini 2.5 Pro (05-06) or Gemini 3.5 Flash?

▼

Based on the Capability Index, Gemini 3.5 Flash scores higher (86.2 vs 75.3). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, Gemini 2.5 Pro (05-06) or Gemini 3.5 Flash?

▼

Gemini 3.5 Flash has a lower blended cost. Gemini 2.5 Pro (05-06): $1.25 input / $10.00 output. Gemini 3.5 Flash: $1.50 input / $9.00 output.

Which has a larger context window, Gemini 2.5 Pro (05-06) or Gemini 3.5 Flash?

▼

Gemini 2.5 Pro (05-06) has a larger context window: Gemini 2.5 Pro (05-06) supports 1M tokens vs Gemini 3.5 Flash at 1M tokens.

Do both Gemini 2.5 Pro (05-06) and Gemini 3.5 Flash support vision?

▼

Yes, both Gemini 2.5 Pro (05-06) and Gemini 3.5 Flash support vision/image input.

What are the key differences between Gemini 2.5 Pro (05-06) and Gemini 3.5 Flash?

▼

Key differences: Gemini 3.5 Flash has a notably higher capability index (10.9 point gap). 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 Gemini 2.5 Pro (05-06) and Gemini 3.5 Flash for free on idapt.app to see which performs better for your specific needs.

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