AI Progress Tracker

    Claude Sonnet 5.5 · claude-sonnet-5-5

    Anthropic · 28 Sep 2026

    Ask the Advisor about this model
    83from 5
    benchmarks

    Claude Sonnet 5.5’s release status, model identifier, context window and pricing: Not yet confirmed by public reporting. Model-specific benchmark results, capabilities and safety findings: Not yet confirmed by public reporting.

    context: 1Mtextimagefile

    Benchmark results

    Every figure links to where it was published. Compare like with like — harnesses and prompt setups differ between vendors.

    BenchmarkScoreSource
    GPQA DiamondPhD-level science questions95.6%29 Sep 2026View
    OTIS Mock AIME 2024-25Competition mathematics100%29 Sep 2026View
    SimpleQA VerifiedShort factual questions (hallucination resistance)46.5%29 Sep 2026View
    LMArena TextHuman preference Elo from blind chat votes (not a percentage)1473 Elo22 Oct 2026View
    LMArena WebDevHuman preference Elo for building web apps (not a percentage)1769 Elo23 Oct 2026View

    Weighted mean of 3 verified benchmark results: GPQA Diamond 95.6%, OTIS Mock AIME 2024-25 100%, SimpleQA Verified 46.5%.

    Security & risk dashboardLatest vulnerabilities, advisories and real-world incidents for Claude Sonnet 5.5

    References

    Profile last reviewed 10/27/2026 and re-checked automatically every few hours against the vendor's published documentation, papers and public leaderboards. Scores come from the cited benchmark results above — confirm limits and pricing against the provider's own documentation before building on them.