Gemini 3.1 Flash-Lite vs Seed 1.8
Gemini 3.1 Flash-Lite and Seed 1.8 are closely matched at 30.9 and 34.2 on the LLM Stats Score. Gemini 3.1 Flash-Lite is 1.2x cheaper per token.
Google · ByteDance · Updated for 2026
Which is better?
Gemini 3.1 Flash-Lite and Seed 1.8 are closely matched on the overall LLM Stats Score at 30.9 and 34.2.
In the 3 individual benchmarks reported for both models, Gemini 3.1 Flash-Lite wins 3; this is a narrower head-to-head signal than the composite indexes.
On price, Gemini 3.1 Flash-Lite is roughly 1.2x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 3.1 Flash-Lite also accepts a larger context window (1,000,000 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 3.1 Flash-Lite
- you value its reported benchmark strengths — it wins 3 of 3 exact shared results
- cost matters — it's about 1.2x cheaper per token
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Mar 2026
Choose Seed 1.8
- you want predictable pricing at $0.25/M input and $2.00/M output
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
11 reported for Gemini 3.1 Flash-Lite · 57 for Seed 1.8
Gemini 3.1 Flash-Lite outperforms in 3 benchmarks (CharXiv-R, MMMU-Pro, VideoMMMU), while Seed 1.8 is better at 0 benchmarks.
Gemini 3.1 Flash-Lite 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 3.1 Flash-Lite ($0.25/1M tokens) costs the same as Seed 1.8 ($0.25/1M tokens).
For output processing, Gemini 3.1 Flash-Lite ($1.50/1M tokens) is 1.3x cheaper than Seed 1.8 ($2.00/1M tokens).
In conclusion, Seed 1.8 is more expensive than Gemini 3.1 Flash-Lite.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 3.1 Flash-Lite accepts 1,000,000 input tokens compared to Seed 1.8's 256,000 tokens. Gemini 3.1 Flash-Lite can generate longer responses up to 1,000,000 tokens, while Seed 1.8 is limited to 256,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Gemini 3.1 Flash-Lite and Seed 1.8 support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Gemini 3.1 Flash-Lite
Seed 1.8
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 3.1 Flash-Lite was released on 2026-03-03, while Seed 1.8 was released on 2026-02-17.
Gemini 3.1 Flash-Lite is 0 month newer than Seed 1.8.
Mar 3, 2026
6 months ago
2w newerFeb 17, 2026
7 months ago
Knowledge Cutoff
When training data ends
Gemini 3.1 Flash-Lite has a documented knowledge cutoff of 2025-01-31, while Seed 1.8's cutoff date is not specified.
We can confirm Gemini 3.1 Flash-Lite's training data extends to 2025-01-31, but cannot make a direct comparison without Seed 1.8's cutoff date.
Jan 2025
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Provider Availability
Gemini 3.1 Flash-Lite is available from DeepInfra, Google. Seed 1.8 is available from DeepInfra.
Gemini 3.1 Flash-Lite
Seed 1.8
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 3.1 Flash-Lite and Seed 1.8 side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 3.1 Flash-Lite vs Seed 1.8.