Gemini 3.8 Live vs Claude Opus 5.5

Pyyan / Compare / Gemini 3.8 Live vs Claude Opus 5.5

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Language Models · verified 24 Sept 2026

Gemini 3.8 LiveGooglecurrent

Claude Opus 5.5Anthropiccurrent

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Specification	Gemini 3.8 Live	Claude Opus 5.5
Summary	Audio in, audio out, and it keeps talking while it runs your tools.	Fable 5.1's level of work on most tasks, at 40% less to run than Opus 5.
Context	Not published	1M
Input ($/Mtok)	$0.75	$4
Output ($/Mtok)	$4.5	$20
Licence	Proprietary	Proprietary
Max output	Not published	128K
Parameters	Not published	Not published
Released	15 Sep 2026	22 Sep 2026
Model ID	gemini-3.8-live	claude-opus-5-5
Category	Language Models	Language Models
Official	Google ↗	Anthropic ↗

Highlighted rows are where these differ.

Runs tools and API calls in the background while the conversation continues
97 languages, detected and switched mid conversation
$3 per million audio tokens in and $12 out, or half a cent and 1.8 cents a minute

Best for real time voice agents.

66.4% on Terminal-Bench 4.0 against 52.3% for Opus 5, on Anthropic's own harness
Cache reads cut 60% to $0.20, and output more than 30% faster than Opus 5
Attempts to work around its boundaries 85% less often than Opus 5, Anthropic reports

Best for agentic coding at flagship quality.