# Claude Sonnet 5.5 vs Gemini 3.5 Flash

As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 3.5 Flash in 5 of 7 shared categories: Reasoning, Science, Coding › Web dev, Long context, and Vision.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

Gemini 3.5 Flash: $3.375 per 1M blended tokens.

Claude Sonnet 5.5: closed weights.

Gemini 3.5 Flash: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Gemini 3.5 Flash leads Claude Sonnet 5.5 in General LLM at #25 against #29.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 3.5 Flash in Reasoning at #18 against #35.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 3.5 Flash in Science at #3 against #18.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 3.5 Flash in Coding › Web dev at #3 against #52.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 3.5 Flash in Long context at #11 against #33.
- Which to pick, Vision: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 3.5 Flash in Vision at #1 against #29.
- Which to pick, Factuality: As of Oct 15, 2026, Gemini 3.5 Flash leads Claude Sonnet 5.5 in Factuality at #14 against #17.

As of Oct 15, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; methodology v1.0).

As of Oct 15, 2026, Gemini 3.5 Flash is ranked #12 in Abstraction (ARC) (since Oct 15, 2026; sources ARC-AGI; methodology v1.0).