Modeldex

Anthropic · Text line

Claude Sonnet

4 stages over 12 months, from Claude Sonnet 4.5 in Sep 2025 to Claude Sonnet 5.5 in Sep 2026.

Evolution chamber01 / 04
Anthropic

Claude Sonnet 4.5

CTX200K
74Quality
Reasoning · Vision · Tools
TextImagePDFInput$3/M
TextOutput$15/M

Balanced Claude model for coding, analysis, agent workflows, and cost control

PaidProprietary665/1040
Ready to evolve

Every generation. A new possibility.

Claude Sonnet 4.5 · Sep 2025
View model : Claude Sonnet 4.5

4 stages, from Claude Sonnet 4.5 (Sep 2025) to Claude Sonnet 5.5 (Sep 2026). Press Evolve to watch each step.

How it grew

Context window

  1. 200Kv4.5
  2. 1Mv4.6
  3. 1Mv5
  4. 1Mv5.5

Max output

  1. 64Kv4.5
  2. 128Kv4.6
  3. 128Kv5
  4. 128Kv5.5

Output priceper 1M tokens, lower is better

  1. $15.00v4.5
  2. $15.00v4.6
  3. $10.00v5
  4. $10.00v5.5

Every stage

  1. v4.5 Stage 1

    Anthropic

    Claude Sonnet 4.5

    CTX200K
    74Quality
    Reasoning · Vision · Tools
    TextImagePDFInput$3/M
    TextOutput$15/M

    Balanced Claude model for coding, analysis, agent workflows, and cost control

    PaidProprietary665/1040

  2. v4.6 Stage 2

    Anthropic

    Claude Sonnet 4.6

    CTX1M
    83Quality
    Reasoning · Vision · Tools
    TextImagePDFInput$3/M
    TextOutput$15/M

    Claude workhorse for coding agents, careful analysis, and production cost control

    PaidProprietary786/1040

  3. v5 Stage 3

    Anthropic

    Claude Sonnet 5

    CTX1M
    92Quality
    Reasoning · Vision · Tools
    TextImagePDFInput$2/M
    TextOutput$10/M

    Everyday Claude agent model for coding, planning, browsing, and general work

    PaidProprietary933/1040

  4. v5.5 Stage 4

    Anthropic

    Claude Sonnet 5.5

    CTX1M
    98Quality
    Reasoning · Vision · Tools
    TextImagePDFInput$2/M
    TextOutput$10/M

    Fast Claude model for everyday coding, agents, and knowledge work

    PaidProprietary1023/1040

More Anthropic lines

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