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Claude 3.5 Sonnet v2 and Claude 3.5 Haiku

Claude 3.5 Sonnet v2 and 3.5 Haiku launched October 2024 with Computer Use beta, cursor control, upgraded coding and tool use, and cheaper Haiku at $0.80/$4.

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Published Jan 28, 2026Model Picker hub

October 22, 2024 was a double launch. A refreshed Claude 3.5 Sonnet with real gains on coding and tool use. A brand new Claude 3.5 Haiku for fast, cheap work. And one feature nobody saw coming: Computer Use, a mode where Claude could look at a screen, move a cursor, click buttons, and type like a person.

Key Specs

SpecClaude 3.5 Sonnet v2Claude 3.5 Haiku
API IDclaude-3-5-sonnet-20241022claude-3-5-haiku-20241022
Context window200K tokens200K tokens
Input pricing$3 / 1M tokens$0.80 / 1M tokens
Output pricing$15 / 1M tokens$4 / 1M tokens
Max output tokens8,1928,192
Release dateOctober 22, 2024October 22, 2024

Computer Use (public beta)

This was the headline. Claude could look at a screenshot, read what was on screen, and decide where to click or what to type next. Not a browser macro. Not a scripted automation tool. The model was actually driving the desktop.

No major AI had shipped anything like it before. Computer Use opened up agent work that did not need a custom API for every tool. Point Claude at the interface and it could get the job done.

The feature ran in public beta through the API. Developers used it to build agents that:

  • Move through web applications and fill out forms
  • Move between desktop applications
  • Extract information from visual interfaces
  • Perform repetitive GUI-based tasks
  • Test software by interacting with the actual UI

Claude needed screenshots in and coordinate outputs back. Anthropic wired safety limits in on top: the model could not take irreversible steps without confirmation, and rate limits kept it from running wild.

Upgraded Sonnet

The v2 was not a small patch. Coding, tool use, and following complex instructions all moved forward. Agent workflows that chained multiple tool calls, read the results, and adjusted on the fly got noticeably better. Developers using Claude as a coding assistant felt the bump right away.

Pricing stayed at $3/$15 per million tokens. The context window stayed at 200K. But the output quality was a real step up, and the "close but not quite" moments that plagued the original Sonnet got less frequent.

Claude 3.5 Haiku

The new Haiku pulled 3.5-generation smarts down to the budget tier. At $0.80/$4 per million tokens, it was a strong pick for classification, content moderation, chat products, and any high-volume job where cost matters more than peak reasoning.

Status

ModelStatus
Claude 3.5 Sonnet v2Superseded by Claude 3.7 Sonnet (February 2025)
Claude 3.5 HaikuStill referenced in some deployments

Both models have been passed by newer generations. But they mark the moment Claude stopped being a pure text generator. Computer Use was the proof point that opened the door to the more capable agent work that showed up in Claude 3.7 Sonnet and Claude 4.

Related Pages

  • All Claude Models for the full model index
  • Claude 3.5 Sonnet, the original June 2024 release
  • Claude 3.7 Sonnet, the next generation with hybrid reasoning

More in Model Picker

  • Claude Mythos: The Model That Thinks in Loops
    Claude Mythos is suspected to use recurrent-depth architecture: one shared layer looped N times, with ACT halting so hard questions get more passes and easy ones stop early.
  • Claude Opus 4.7 vs Other AI Models
    Claude Opus 4.7, GPT-5.4, Kimi K2.6, Gemini 3.1 Pro, DeepSeek V3.2: benchmarks, context windows, agent reliability, and cost, so you reach for the right one.
  • DeepSeek V4: Pricing, Context, and Migration
    DeepSeek V4 ships two models: V4-Flash at $0.28/M output and V4-Pro at $3.48/M. Both carry a genuine 1M context window and drop into any Anthropic-compatible SDK with one line changed.
  • Every Claude Model
    Every Claude model on one page: Claude 3, 3.5, 3.7, 4, Opus 4.1 to 4.6, Sonnet 4.5 and 4.6, Haiku 4.5. Specs, pricing, benchmarks, and when to use each.
  • Claude 3.5 Sonnet
    Claude 3.5 Sonnet launched June 2024 at $3/$15, beating Claude 3 Opus on MMLU, GPQA, HumanEval at a fifth of the cost. Specs, benchmarks, and code gains.
  • Claude 3.7 Sonnet
    Claude 3.7 Sonnet shipped February 2025 with hybrid reasoning and extended thinking. 64K output, thinking-budget control, SWE-bench coding gains at $3/$15.

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On this page

Key Specs
Computer Use (public beta)
Upgraded Sonnet
Claude 3.5 Haiku
Status
Related Pages

Stop configuring. Start building.

SaaS builder templates with AI orchestration.