HEAD TO HEAD
Make the
right call.
Pick two to four models. Compare category evidence, price, context, speed and capabilities side by side.
Sign in to save this comparison →01 / SCORECARD
Coding focus · side by side
| Metric | Claude Opus 5.5 | Gemini 3.8 Flash |
|---|---|---|
| Quantum Score | 88QUANTUM SCORE | 58QUANTUM SCORE |
| Confidence / coverage | Moderate confidence · 85% · 4 independent domains | Moderate confidence · 85% · 4 independent domains |
| Context window | 1,000,000 tokens | — tokens |
| Modalities / tools | text, image · tool use, vision | text, image · vision, tool use |
| Coding | 87 | 16 -71 vs first |
| Reasoning | 97 | 62 -35 vs first |
| Math | 92 | 95 +3 vs first |
| Research | — | — |
| Agents | 100 | 60 -40 vs first |
| Multimodal | 98 | 91 -7 vs first |
| Speed | — | — |
| Value | 53 | 56 +3 vs first |
| Input / 1M | $4.00 | $0.75 |
| Output / 1M | $20.00 | $3.75 |
| Measured output speed | 92 tokens/s · Max effort | — |
02 / EVIDENCE
Published benchmark evidence
| Benchmark | Claude Opus 5.5 | Gemini 3.8 Flash |
|---|---|---|
| LiveBench code_completion · 2026-06-25 · Public table; published model effort variant | 86.957 % benchmark maintainer ↗ | 71.739 % benchmark maintainer ↗ |
| LiveBench code_generation · 2026-06-25 · Public table; published model effort variant | 91.549 % benchmark maintainer ↗ | 73.239 % benchmark maintainer ↗ |
| LiveBench javascript · 2026-06-25 · Public table; published model effort variant | 81.818 % benchmark maintainer ↗ | 72.727 % benchmark maintainer ↗ |
| LiveBench AMPS_Hard · 2026-06-25 · Public table; published model effort variant | 98 % benchmark maintainer ↗ | 99 % benchmark maintainer ↗ |
| LiveBench olympiad · 2026-06-25 · Public table; published model effort variant | 93.251 % benchmark maintainer ↗ | 92.159 % benchmark maintainer ↗ |
| LiveBench theory_of_mind · 2026-06-25 · Public table; published model effort variant | 84.615 % benchmark maintainer ↗ | 76.923 % benchmark maintainer ↗ |
| LiveBench zebra_puzzle · 2026-06-25 · Public table; published model effort variant | 100 % benchmark maintainer ↗ | 98.25 % benchmark maintainer ↗ |
| MedXpertQA MM Mercor public leaderboard · MedXpertQA MM Mercor 200 public tasks · Mercor independent evaluation | 85.7 % independent lab ↗ | 84.7 % independent lab ↗ |
AS THE EVIDENCE CHANGED
Comparison history
Dated releases, price events, and benchmark publications. A price or test change can alter the factual comparison; this timeline does not pick a winner.
2026-09-22 · Claude Opus 5.5 released ↗ · source
2026-09-02 · Gemini 3.8 Flash released ↗ · source
2026-09-30 verified (test date not published) · gemini-3-8-flash entered LiveBench code_completion (2026-06-25) at 71.739 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-8-flash entered LiveBench code_generation (2026-06-25) at 73.239 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-8-flash entered LiveBench javascript (2026-06-25) at 72.727 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-8-flash entered LiveBench AMPS_Hard (2026-06-25) at 99 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-8-flash entered LiveBench olympiad (2026-06-25) at 92.159 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-8-flash entered LiveBench theory_of_mind (2026-06-25) at 76.923 % · source ↗
2026-09-30 verified (test date not published) · gemini-3-8-flash entered LiveBench zebra_puzzle (2026-06-25) at 98.25 % · source ↗
2026-09-30 verified (test date not published) · claude-opus-5-5 entered LiveBench code_completion (2026-06-25) at 86.957 % · source ↗
2026-09-30 verified (test date not published) · claude-opus-5-5 entered LiveBench code_generation (2026-06-25) at 91.549 % · source ↗
2026-09-30 verified (test date not published) · claude-opus-5-5 entered LiveBench javascript (2026-06-25) at 81.818 % · source ↗
2026-09-30 verified (test date not published) · claude-opus-5-5 entered LiveBench AMPS_Hard (2026-06-25) at 98 % · source ↗
2026-09-30 verified (test date not published) · claude-opus-5-5 entered LiveBench olympiad (2026-06-25) at 93.251 % · source ↗
An overall score appears only after enough current, comparable, independently sourced results exist. Pricing and individual benchmark results remain visible meanwhile.