# Claude Sonnet 5.5 vs Gemini 2.0 Flash Thinking Exp 01.21

As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.0 Flash Thinking Exp 01.21 in 2 of 2 shared categories: Math and Science.

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

Gemini 2.0 Flash Thinking Exp 01.21: price per 1M tokens is unset in the catalog.

Claude Sonnet 5.5: closed weights.

Gemini 2.0 Flash Thinking Exp 01.21: closed weights.

- Which to pick, Math: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.0 Flash Thinking Exp 01.21 in Math at #4 against #36.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Gemini 2.0 Flash Thinking Exp 01.21 in Science at #3 against #112.

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 2.0 Flash Thinking Exp 01.21 is ranked #36 in Math (since Oct 15, 2026; sources Humanity's Last Exam; methodology v1.0).