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Claude 3.5 Sonnet vs Claude 3.7 Sonnet

A complete head-to-head: pricing, context window, benchmarks, modality coverage, and openness, with a programmatic verdict synthesized from the underlying data.

Updated

Claude 3.5 Sonnet specs · Claude 3.7 Sonnet specs
Verdict by category
  • PriceTie

    Both land near $15.00 / 1M output tokens, call it a wash on cost.

  • Context windowTie

    Both ship a 200K-token context window.

  • BenchmarksTie

    Across 1 shared benchmarks the two models split wins evenly. Look at task-specific scores rather than the average.

  • ModalitiesTie

    Both handle text, vision.

  • OpennessTie

    Both are closed-weight, API-only.

It's a genuine coin-flip between Claude 3.5 Sonnet and Claude 3.7 Sonnet: 0 category wins each, with the rest tied. Both land near $15.00 / 1M output tokens, call it a wash on cost. Both ship a 200K-token context window.

Across 1 shared benchmarks the two models split wins evenly. Look at task-specific scores rather than the average. Both target the same set of modalities (text, vision), so the deciding factors are price, context, and raw quality. Both are closed-weight, API-only.

Claude 3.7 Sonnet is the newer of the two, released 4 months after Claude 3.5 Sonnet, which usually means a more recent knowledge cutoff and updated safety post-training. Claude 3.5 Sonnet is usually picked for coding llm and code review workloads, while Claude 3.7 Sonnet sees more deployments in coding llm and creative writing. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

SpecClaude 3.5 SonnetClaude 3.7 Sonnet
ProviderAnthropicAnthropic
ReleasedOct 2024Feb 2025
Modalitiestext, visiontext, vision
Context window200K tokens200K tokens
Max output,,
Input · 1M$3.00 / 1M tokens$3.00 / 1M tokens
Output · 1M$15.00 / 1M tokens$15.00 / 1M tokens
Knowledge cutoff,2024-10
Open weightsNoNo
API availableYesYes

Pricing at scale

What you'd actually pay at typical workloads. Numbers come from each model's published per-million-token rates.

  • Light usage, 100k in / 50k out per day$31.50 vs $31.50
  • Heavy usage, 1M in / 500k out per day$315 vs $315
  • RAG workload, 5M in / 200k out per day$540 vs $540

Light usage, 100k in / 50k out per day: both models cost about $31.50 a month, call it a tie. Heavy usage, 1M in / 500k out per day: both models cost about $315 a month, call it a tie. RAG workload, 5M in / 200k out per day: both models cost about $540 a month, call it a tie.

Price calculator

Estimated spend for the listed models at your usage. Numbers are derived from each model's published per-million-token rates.

  • Claude 3.5 Sonnet$1.05
  • Claude 3.7 Sonnet$1.05

Benchmarks compared

Only sourced numbers. Where a benchmark is missing for one model we show the available value rather than fabricating the other.

Claude 3.5 SonnetClaude 3.7 Sonnet
  • HumanEval92.092.0
  • SWE-bench Verified,62.3
Pick Claude 3.5 Sonnet if

Claude 3.5 Sonnet fits when…

  • Mature and battle-tested
  • Strong code
Pick Claude 3.7 Sonnet if

Claude 3.7 Sonnet fits when…

  • First Claude with extended thinking
  • Excellent writing and coding quality
  • Mature, widely-tested
Don't want either?

Consider Claude Opus 4.7

Anthropic's mid-2026 flagship, ahead on SWE-bench, agent reliability, and writing quality.

See Claude Opus 4.7 specsClaude 3.5 Sonnet vs Claude Opus 4.7Claude 3.7 Sonnet vs Claude Opus 4.7

Frequently asked

  • Is Claude 3.5 Sonnet or Claude 3.7 Sonnet cheaper?
    Both Claude 3.5 Sonnet and Claude 3.7 Sonnet are priced equivalently at $15.00 / 1M tokens per million output tokens.
  • Which has the larger context window?
    Both Claude 3.5 Sonnet and Claude 3.7 Sonnet ship a 200K-token context window.
  • Is Claude 3.5 Sonnet or Claude 3.7 Sonnet better for coding?
    Both Claude 3.5 Sonnet and Claude 3.7 Sonnet are competitive on coding benchmarks. See each model's individual spec page for HumanEval and SWE-bench scores where published. For an opinionated pick, consult our Best LLM for Coding ranking.
  • Are either of these models open source?
    Neither model ships open weights, both are accessible only via their respective providers' APIs.
  • When were Claude 3.5 Sonnet and Claude 3.7 Sonnet released?
    Claude 3.5 Sonnet was released by Anthropic on 2024-10-22. Claude 3.7 Sonnet was released by Anthropic on 2025-02-24.
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