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Claude 3.7 Sonnet vs Claude Sonnet 4

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

Updated

Claude 3.7 Sonnet specs · Claude Sonnet 4 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.

  • BenchmarksClaude Sonnet 4

    Claude Sonnet 4 leads in 1 of 1 shared benchmarks; the biggest gap is on SWE-bench Verified (real-world software engineering), where it scores 65.0 vs 62.3.

  • ModalitiesTie

    Both handle text, vision.

  • OpennessTie

    Both are closed-weight, API-only.

On balance Claude Sonnet 4 edges ahead, winning 1 of 5 categories against Claude 3.7 Sonnet's 0. Both land near $15.00 / 1M output tokens, call it a wash on cost. Both ship a 200K-token context window.

Claude Sonnet 4 leads in 1 of 1 shared benchmarks; the biggest gap is on SWE-bench Verified (real-world software engineering), where it scores 65.0 vs 62.3. 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 Sonnet 4 is the newer of the two, released 3 months after Claude 3.7 Sonnet, which usually means a more recent knowledge cutoff and updated safety post-training. Claude 3.7 Sonnet is usually picked for coding llm and creative writing workloads, while Claude Sonnet 4 sees more deployments in coding llm and rag. If pricing matters more than every last benchmark point, run the numbers in the calculator below before committing.

Side-by-side specs

SpecClaude 3.7 SonnetClaude Sonnet 4
ProviderAnthropicAnthropic
ReleasedFeb 2025May 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 cutoff2024-102025-03
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 3.7 Sonnet$1.05
  • Claude Sonnet 4$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 3.7 SonnetClaude Sonnet 4
  • HumanEval92.0
  • SWE-bench Verified62.365.0
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
Pick Claude Sonnet 4 if

Claude Sonnet 4 fits when…

  • Solid all-rounder
  • Mature deployment ecosystem
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 3.7 Sonnet vs Claude Opus 4.7Claude Sonnet 4 vs Claude Opus 4.7

Frequently asked

  • Is Claude 3.7 Sonnet or Claude Sonnet 4 cheaper?
    Both Claude 3.7 Sonnet and Claude Sonnet 4 are priced equivalently at $15.00 / 1M tokens per million output tokens.
  • Which has the larger context window?
    Both Claude 3.7 Sonnet and Claude Sonnet 4 ship a 200K-token context window.
  • Is Claude 3.7 Sonnet or Claude Sonnet 4 better for coding?
    Both Claude 3.7 Sonnet and Claude Sonnet 4 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 3.7 Sonnet and Claude Sonnet 4 released?
    Claude 3.7 Sonnet was released by Anthropic on 2025-02-24. Claude Sonnet 4 was released by Anthropic on 2025-05-22.
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