Model Comparison
Gemini 2.5 Pro Preview 06-05 vs Gemini 3.6 FlashWhich is better in 2026?
Gemini 3.6 Flash significantly outperforms across most benchmarks. Gemini 3.6 Flash is 1.1x cheaper per token.
Verdict: Gemini 2.5 Pro Preview 06-05 vs Gemini 3.6 Flash — which is better?
Gemini 2.5 Pro Preview 06-05 (by Google) and Gemini 3.6 Flash (by Google) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.
Gemini 2.5 Pro Preview 06-05 outperforms in 0 benchmarks, while Gemini 3.6 Flash is better at 1 benchmark (MRCR v2 (8-needle)). Gemini 3.6 Flash significantly outperforms across most benchmarks.
On price, Gemini 3.6 Flash is roughly 1.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Choose Gemini 2.5 Pro Preview 06-05 if…
- you want predictable pricing at $1.25/M input and $10.00/M output
Choose Gemini 3.6 Flash if…
- you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
- cost matters — it's about 1.1x cheaper per token
- you want the most recent training data — it shipped Jul 2026
Performance Benchmarks
Comparative analysis across standard metrics
Gemini 2.5 Pro Preview 06-05 outperforms in 0 benchmarks, while Gemini 3.6 Flash is better at 1 benchmark (MRCR v2 (8-needle)).
Gemini 3.6 Flash significantly outperforms across most benchmarks.
Arena Performance
Human preference votes
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 2.5 Pro Preview 06-05 ($1.25/1M tokens) is 1.2x cheaper than Gemini 3.6 Flash ($1.50/1M tokens).
For output processing, Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens) is 1.3x more expensive than Gemini 3.6 Flash ($7.50/1M tokens).
In conclusion, Gemini 2.5 Pro Preview 06-05 is more expensive than Gemini 3.6 Flash.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Both models have the same input context window of 1,048,576 tokens. Gemini 3.6 Flash can generate longer responses up to 65,536 tokens, while Gemini 2.5 Pro Preview 06-05 is limited to 65,535 tokens.
Input Capabilities
Supported data types and modalities
Both Gemini 2.5 Pro Preview 06-05 and Gemini 3.6 Flash support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 2.5 Pro Preview 06-05
Gemini 3.6 Flash
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05, while Gemini 3.6 Flash was released on 2026-07-21.
Gemini 3.6 Flash is 14 months newer than Gemini 2.5 Pro Preview 06-05.
Jun 5, 2025
1.1 years ago
Jul 21, 2026
0 days ago
1.1yr newerKnowledge Cutoff
When training data ends
Gemini 2.5 Pro Preview 06-05 has a knowledge cutoff of 2025-01-31, while Gemini 3.6 Flash has a cutoff of 2026-03-31.
Gemini 3.6 Flash has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to Gemini 2.5 Pro Preview 06-05 (2025-01-31).
Jan 2025
Mar 2026
1.2 yr newerProvider Availability
Gemini 2.5 Pro Preview 06-05 is available from Google. Gemini 3.6 Flash is available from Google.
Gemini 2.5 Pro Preview 06-05
Gemini 3.6 Flash
Outputs Comparison
Key Takeaways
Detailed Comparison
Interactive Arena
Judge for yourself.
Run your own prompts against Gemini 2.5 Pro Preview 06-05 and Gemini 3.6 Flash side-by-side, then vote on the output you prefer.
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FAQ
Common questions about Gemini 2.5 Pro Preview 06-05 vs Gemini 3.6 Flash.