Gemini 3.8 Flash
The fast daily driver of the top 10.
Ranked #9 of 402 on LMArena's overall board (style control) · retrieved 2026-09-19
The numbers
Arena Score (LMArena, style control)1493 (1484.4–1501.6, 5,076 votes)
Coding board score1535 (#10, 1,434 votes)
Intelligence Index (Artificial Analysis)41.2
Median output speed~298 tokens/sec
Price per 1M tokens in/out (LMArena)$0.75 / $3.75
Context window~1M
LicenseProprietary
Released2026-09-02
Exact source entries: LMArena “gemini-3.8-flash-high” · Artificial Analysis “Gemini 3.8 Flash (high)”, retrieved 2026-09-19.
Try or learn moreHonest read
Best at
- Arena Score 1493 — top-10 quality at $0.75 / $3.75 per million tokens
- Measured output speed 298 tokens/second (median) — the fastest model in our top 10
- 1,048,576-token context window
Not the pick for
- Below the Anthropic top tier on raw quality
- Google's Flash naming makes 3.7 vs 3.8 easy to confuse when you buy
Choose it if you are
High-volume assistants and agents where snappy answers and cost control matter.
Rankings come from the sources above; this plain-language read is our editorial summary of those numbers.
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Best reasoning
Highest Intelligence Index we track
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Best open model
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Best value
Intelligence per dollar
GLM 5.3 Flash · 176 pts / $1M
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