Gemini 3.8 Flash
by Google
Gemini 3.8 Flash is a model from Google, released on September 2, 2026. It has a 1M-token context window and can generate up to 66K output tokens. API pricing is $0.75 per 1M input tokens and $3.75 per 1M output tokens. It ranks #21 of 220 models by Intelligence Score with a score of 48.7.
Gemini 3.8 Flash is Google's most intelligent Flash model, engineered for long-horizon software engineering, autonomous agents, and complex enterprise workflows. It accepts text, image, video, audio, and PDF input, produces text, and supports a 1,048,576-token input context and 65,536-token output. It supports low, medium, and high thinking levels, with medium as the default; minimal is not supported. Launch results include 73.7% on DeepSWE v1.1, 89.4% on Terminal-Bench 2.1, 61.4% on Vals Finance Agent v2, and 54.9% on HLE-Verified. Introductory Gemini API pricing is $0.75 per million input tokens and $3.75 per million output tokens through 2026-12-31; standard pricing of $1.50/$7.50 begins 2027-01-01.
Key specs
| Provider | |
|---|---|
| Release date | 2026-09-02 |
| License | proprietary |
| Context window | 1M tokens |
| Max output | 66K tokens |
| Input price | $0.75 / 1M tokens |
| Output price | $3.75 / 1M tokens |
| Intelligence Score | 48.7 |
| Coding index | 35.9 |
| Output speed | 369 tokens/s |
| Time to first token | 3.71 s |
Quick answers
What is the context window of Gemini 3.8 Flash?
Gemini 3.8 Flash has a context window of 1M tokens, with a maximum output of 66K tokens per response.
How much does Gemini 3.8 Flash cost?
Gemini 3.8 Flash costs $0.75 per 1M input tokens and $3.75 per 1M output tokens through the API.
Is Gemini 3.8 Flash open source?
No. Gemini 3.8 Flash is a proprietary model from Google (proprietary license).
When was Gemini 3.8 Flash released?
Google released Gemini 3.8 Flash on September 2, 2026.
How does Gemini 3.8 Flash compare to Claude Opus 5.5 (Reasoning)?
Gemini 3.8 Flash scores 48.7 on the Intelligence Score versus 60.5 for Claude Opus 5.5 (Reasoning), the current #1. Input pricing is $0.75 vs $4 per 1M tokens.
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