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    Anthropic · Anthropic

    Claude Opus 4.8 vs Claude Sonnet 5

    Compare Claude Opus 4.8 (Anthropic) and Claude Sonnet 5 (Anthropic) on benchmarks, capabilities, and pricing.

    At a glance

    Claude Opus 4.8Claude Sonnet 5
    ProviderAnthropicAnthropic
    Context1M tokens1M tokens
    ModalityMultimodalMultimodal
    PricingMaxPro
    SpeedMediumFast
    ReasoningExpertExpert

    Benchmarks

    Claude Opus 4.8

    AA Intelligence Index
    42points
    Artificial Analysis · Date unknownAge unknown
    Output speed
    75tokens/s
    Artificial Analysis · As of Aug 11, 2026Stale · 31d old
    API input cost
    $5.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    API output cost
    $25.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    Context window
    1M
    Catalog · As of Aug 11, 2026Stale · 31d old

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

    AA data retrieved Sep 11, 2026 · Artificial Analysis

    Claude Sonnet 5

    AA Intelligence Index
    38.4points
    Artificial Analysis · Date unknownAge unknown
    Output speed
    83.7tokens/s
    Configuration: Prompt length: 1,000 · Parallel queries: 1
    Artificial Analysis · Date unknownAge unknown
    API input cost
    $2.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    API output cost
    $10.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    Context window
    1M
    Catalog · As of Aug 11, 2026Stale · 31d old

    Benchmark variant: Claude Sonnet 5 (Adaptive Reasoning, Max Effort)

    AA data retrieved Sep 11, 2026 · Artificial Analysis

    Try both on yno.ai

    Switch between Claude Opus 4.8 and Claude Sonnet 5 per task with one account.

    Frequently asked

    Which is faster, Claude Opus 4.8 or Claude Sonnet 5?
    Claude Opus 4.8 is rated medium and Claude Sonnet 5 is rated fast. yno.ai surfaces output-speed scores from Artificial Analysis on each model's detail page so you can compare exact tokens-per-second figures for your workload.
    Which is cheaper, Claude Opus 4.8 or Claude Sonnet 5?
    Claude Opus 4.8 is on the max tier in yno.ai; Claude Sonnet 5 is on the pro tier. See the pricing page for the latest per-tier limits.
    Which is better for Complex software engineering?
    Both models support Complex software engineering. Claude Opus 4.8 brings 1M context / 128K output; Claude Sonnet 5 brings Coding and agent workflows. Run a side-by-side eval on your prompts in yno.ai to see which fits your workload.
    Can I use both Claude Opus 4.8 and Claude Sonnet 5 in yno.ai?
    Yes. Both are available on yno.ai under your single account; you can route different stages of an agent to different models or A/B test them on the same prompt without per-provider boilerplate.

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