Google has officially rolled out Gemini 3.8 Flash, keeping the same pricing as Gemini 3.7 Flash while positioning the new model around long-duration software engineering tasks and autonomous agents. The model supports roughly 1 million tokens of context and up to 65,000 output tokens. Google’s hosted Antigravity Agent has already switched its default model to 3.8 Flash.
In Google’s internal comparison table, Gemini 3.8 Flash ranked first in 8 of 14 benchmark groups. DeepSWE v1.1 improved from 65.3% to 71.0%, narrowing the gap with Opus 5 at 74.0%. On Terminal-bench 2.1, it posted 89.4%, slightly ahead of Opus 5 at 89.1% and GPT-5.6 Sol at 88.8%. Google also said the model led in financial agent tasks, legal agent tasks, complex chart reasoning, and long-video understanding.
The gains were not universal. Gemini 3.8 Flash scored 19.1% on Terminal-bench 4.0 versus 51.8% for Opus 5, and 59.0% on OSWorld-2.0 compared with 75.4% for Opus 5. Pricing remains at $0.75 per million input tokens and $3.75 per million output tokens, both unchanged from 3.7 Flash. Google said those rates are 15% of Opus 5 pricing and will stay in place through Dec. 31 before doubling on Jan. 1, 2027.
Google has officially launched Gemini 3.8 Flash, keeping the model focused on long-duration software engineering work and autonomous agents. It supports about 1 million tokens of context and up to 65,000 output tokens.
Google’s hosted Antigravity Agent has also moved to 3.8 Flash as its default model.
Benchmark results
In Google’s own comparison table, Gemini 3.8 Flash placed first in 8 of 14 scoring groups.
DeepSWE v1.1 improved from 65.3% to 71.0%, putting it close to Opus 5 at 74.0%. On Terminal-bench 2.1, the model reached 89.4%, slightly above Opus 5 at 89.1% and GPT-5.6 Sol at 88.8%.
Google also said Gemini 3.8 Flash posted the top score in financial agent tasks, legal agent tasks, complex chart reasoning, and long-video understanding.
It did not outperform flagship models across the board. On Terminal-bench 4.0, Gemini 3.8 Flash scored 19.1%, versus 51.8% for Opus 5. On OSWorld-2.0, it recorded 59.0%, trailing Opus 5 at 75.4%.
Pricing
Gemini 3.8 Flash is priced at $0.75 per million input tokens and $3.75 per million output tokens, the same rates as Gemini 3.7 Flash. Google said both prices are only 15% of Opus 5 pricing.
The discounted rates will remain in effect through Dec. 31. They will double starting Jan. 1, 2027.
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