Gemini 2.5 Flash-Lite vs Mercury 3
Mercury 3 leads the LLM Stats Score 36.1 to 9.9. Mercury 3 is 1.1x cheaper per token.
Google · Inception · Updated for 2026
Which is better?
Mercury 3 leads the overall LLM Stats Score 36.1 to 9.9, ranking #98 overall.
In the 2 individual benchmarks reported for both models, Mercury 3 wins 2; this is a narrower head-to-head signal than the composite indexes.
On price, Mercury 3 is roughly 1.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 2.5 Flash-Lite also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Gemini 2.5 Flash-Lite
- you process long inputs — it offers a 1,048,576 token context window
- you need open weights you can self-host or fine-tune
Choose Mercury 3
- overall performance matters — it scores 36.1 and ranks #98 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 2 of 2 exact shared results
- cost matters — it's about 1.1x cheaper per token
- you want the most recent training data — it shipped Oct 2026
At a glance
The differences that matter most.
Individual benchmarks
13 reported for Gemini 2.5 Flash-Lite · 12 for Mercury 3
Gemini 2.5 Flash-Lite outperforms in 0 benchmarks, while Mercury 3 is better at 2 benchmarks (GPQA, MRCR v2).
Mercury 3 significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 2.5 Flash-Lite ($0.10/1M tokens) costs the same as Mercury 3 ($0.10/1M tokens).
For output processing, Gemini 2.5 Flash-Lite ($0.40/1M tokens) is 1.1x more expensive than Mercury 3 ($0.35/1M tokens).
In conclusion, Gemini 2.5 Flash-Lite is more expensive than Mercury 3.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 2.5 Flash-Lite accepts 1,048,576 input tokens compared to Mercury 3's 1,000,000 tokens. Mercury 3 can generate longer responses up to 131,072 tokens, while Gemini 2.5 Flash-Lite is limited to 65,536 tokens.
Input capabilities
Documented input modalities across available providers
Gemini 2.5 Flash-Lite supports multimodal inputs, whereas Mercury 3 does not.
Gemini 2.5 Flash-Lite can handle both text and other forms of data like images, making it suitable for multimodal applications.
Gemini 2.5 Flash-Lite
Mercury 3
License
Usage and distribution terms
Gemini 2.5 Flash-Lite is licensed under Creative Commons Attribution 4.0 License, while Mercury 3 uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Creative Commons Attribution 4.0 License
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 2.5 Flash-Lite was released on 2025-06-17, while Mercury 3 was released on 2026-10-19.
Mercury 3 is 16 months newer than Gemini 2.5 Flash-Lite.
Jun 17, 2025
1.3 years ago
Oct 19, 2026
3 days ago
1.3yr newerKnowledge Cutoff
When training data ends
Gemini 2.5 Flash-Lite has a documented knowledge cutoff of 2025-01-01, while Mercury 3's cutoff date is not specified.
We can confirm Gemini 2.5 Flash-Lite's training data extends to 2025-01-01, but cannot make a direct comparison without Mercury 3's cutoff date.
Jan 2025
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Provider Availability
Gemini 2.5 Flash-Lite is available from Google. Mercury 3 is available from Inception.
Gemini 2.5 Flash-Lite
Mercury 3
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 2.5 Flash-Lite and Mercury 3 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 2.5 Flash-Lite vs Mercury 3.