Anthropic

Claude Sonnet 5

6.4/10
Maker
Anthropic
Origin
United States
Released
Jun 30, 2026
Category
Language Models

Strengths & weaknesses

  • Fast and capable, priced for everyday production use
  • Strong default for coding and long documents without Opus-level cost
  • Enabling maximum thinking mode can quietly balloon token spend
  • Trails Opus on the hardest multi-step reasoning problems

Evaluation

80% of weight measured

Scored on Claude Sonnet 5 · sources as of Sep 19, 2026

w = weight, each criterion’s share of the overall score. Missing marks don’t count for or against. How scoring works

Enterprise fit

Highest-ROI use cases

Where Claude Sonnet 5 fits inside a company, ranked by the strength of published ROI evidence for each use case, then by its independent rating for the work.

All 100 enterprise use cases →
  1. 01
    Research, analysis & reportingControlled trial
    Strategy, consulting, finance
    • ▸ Rated #6 of 22 directory models on LMArena text (hard prompts), the closest independent rating for this work
    • ▸ Built for this kind of work (Language Models)
  2. 02
    Marketing, content & salesControlled trial
    Marketing & sales
    • ▸ Rated #9 of 22 directory models on LMArena text (creative writing), the closest independent rating for this work
    • ▸ Built for this kind of work (Language Models)
  3. 03
    Document & data processingControlled trial
    Operations, legal, finance back office
    • ▸ Rated #4 of 9 directory models on LMArena document, the closest independent rating for this work

More in Language Models

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OpenAI

GPT-5.6

7.2/10
  • Best-in-class agentic reasoning, with search, code execution, and computer use in one API
  • Disciplined, low-hallucination output on long, multi-step tasks
  • Long-context requests above roughly 272K tokens get repriced sharply higher
  • Slower to produce a first answer than most rivals at max reasoning
Anthropic

Claude Opus 5

7.1/10
  • Anthropic's recommended model for complex, high-stakes work, with strong reasoning-to-cost
  • Zero-data-retention eligible, useful for regulated or enterprise deployments
  • Sits below the flagship tier in branding despite strong practical scores
  • Costs meaningfully more per token than the Sonnet tier for everyday tasks
Anthropic

Claude Haiku 4.5

5.7/10
  • Cheapest Claude tier, well suited to high-volume, simple tasks
  • Low latency, good for chat-style and classification workloads
  • Smaller context window (200K tokens) than Sonnet 5 and Opus 5 (1M)
  • Noticeably weaker on hard reasoning than Sonnet or Opus
Google

Gemini 3 Pro

  • Native multimodal input across text, image, audio, video, and PDFs
  • Very large context window with strong long-document recall
  • Slower first response than Google's own Flash tier
  • No native image or audio output, understanding only