Gemini 3.8 Flash vs Mercury 2
Gemini 3.8 Flash leads the LLM Stats Score 51.0 to 23.7. Mercury 2 is 4.0x cheaper per token.
Google · Inception · Updated for 2026
Which is better?
Gemini 3.8 Flash leads the overall LLM Stats Score 51.0 to 23.7, ranking #15 overall.
On price, Mercury 2 is roughly 4.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 3.8 Flash 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 3.8 Flash
- overall performance matters — it scores 51.0 and ranks #15 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Mercury 2
- cost matters — it's about 4.0x cheaper per token
At a glance
The differences that matter most.
Individual benchmarks
13 reported for Gemini 3.8 Flash · 6 for Mercury 2
Gemini 3.8 Flash and Mercury 2don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 3.8 Flash ($0.75/1M tokens) is 3.0x more expensive than Mercury 2 ($0.25/1M tokens).
For output processing, Gemini 3.8 Flash ($3.75/1M tokens) is 5.0x more expensive than Mercury 2 ($0.75/1M tokens).
In conclusion, Gemini 3.8 Flash is more expensive than Mercury 2.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 3.8 Flash accepts 1,048,576 input tokens compared to Mercury 2's 128,000 tokens. Gemini 3.8 Flash can generate longer responses up to 65,536 tokens, while Mercury 2 is limited to 8,192 tokens.
Input capabilities
Documented input modalities across available providers
Gemini 3.8 Flash supports multimodal inputs, whereas Mercury 2 does not.
Gemini 3.8 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.
Gemini 3.8 Flash
Mercury 2
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 3.8 Flash was released on 2026-09-02, while Mercury 2 was released on 2026-02-24.
Gemini 3.8 Flash is 6 months newer than Mercury 2.
Sep 2, 2026
2 days ago
6mo newerFeb 24, 2026
6 months ago
Knowledge Cutoff
When training data ends
Gemini 3.8 Flash has a documented knowledge cutoff of 2026-03-31, while Mercury 2's cutoff date is not specified.
We can confirm Gemini 3.8 Flash's training data extends to 2026-03-31, but cannot make a direct comparison without Mercury 2's cutoff date.
Mar 2026
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Provider Availability
Gemini 3.8 Flash is available from Google. Mercury 2 is available from Inception.
Gemini 3.8 Flash
Mercury 2
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 3.8 Flash and Mercury 2 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 3.8 Flash vs Mercury 2.