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    Anthropic

    Claude Opus 4.8

    Anthropic's May 28, 2026 Opus model remains active as a legacy option after Opus 5 launched July 24. It supports a 1M-token context window, up to 128K output and adaptive thinking at standard Claude API rates of $5/$25 per MTok (input/output). In Anthropic's launch evaluation, it was about four times less likely than Opus 4.7 to leave flaws in code it had written unremarked. Dynamic subagent workflows launched separately as a Claude Code research preview.

    1M tokens
    Multimodal
    Max
    Superseded
    Provider
    Anthropic
    Context
    1M
    Catalog · As of Aug 11, 2026Stale · 33d old
    yno subscription tier
    Max
    Released
    May 28, 2026
    Speed
    Medium
    Reasoning
    Expert
    Modality
    Multimodal

    Benchmarks

    Quality

    AA Intelligence Index
    42points
    Artificial Analysis · Date unknownAge unknown
    AA Coding Index
    74.3points
    Artificial Analysis · Date unknownAge unknown
    GPQA Diamond
    92%
    Artificial Analysis · Date unknownAge unknown

    Speed and latency

    Output speed
    75tokens/s
    Artificial Analysis · As of Aug 11, 2026Stale · 33d old

    API pricing

    API input cost
    $5.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    API output cost
    $25.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown

    Benchmark variant: Claude Opus 4.8 (Adaptive Reasoning, Max Effort)

    AA data retrieved Sep 13, 2026 · Artificial Analysis

    Indexes use points; evaluations use accuracy percentages. API measurements do not measure yno application performance. Methodology

    Capabilities

    • Reasoning
    • Code
    • Vision
    • Agentic
    • Long Horizon
    • Research

    Use cases

    • Complex software engineering
    • Long-running agents
    • Code review
    • Architecture analysis

    Strengths

    • 1M context / 128K output
    • Text and image input
    • Adaptive thinking
    • Code review

    Best for

    Teams maintaining Opus 4.8 coding workflows or evaluating migration to Opus 5

    Use Claude Opus 4.8 in yno.ai

    No credit card required

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    Frequently asked

    What is Claude Opus 4.8?
    Anthropic's May 28, 2026 Opus model remains active as a legacy option after Opus 5 launched July 24. It supports a 1M-token context window, up to 128K output and adaptive thinking at standard Claude API rates of $5/$25 per MTok (input/output). In Anthropic's launch evaluation, it was about four times less likely than Opus 4.7 to leave flaws in code it had written unremarked. Dynamic subagent workflows launched separately as a Claude Code research preview.
    How much does Claude Opus 4.8 cost in yno.ai?
    Claude Opus 4.8 is available on the Max tier of yno.ai.
    What can Claude Opus 4.8 do?
    Claude Opus 4.8 is best for Teams maintaining Opus 4.8 coding workflows or evaluating migration to Opus 5. Its main capabilities include Reasoning, Code, Vision, Agentic, Long Horizon, Research.
    How does Claude Opus 4.8 compare to other models?
    Claude Opus 4.8 excels at 1M context / 128K output and is recommended for Complex software engineering, Long-running agents, Code review, Architecture analysis. See related models below.
    How do I use Claude Opus 4.8 in yno.ai?
    Sign up for yno.ai, select Claude Opus 4.8 from the model picker, and start chatting.