Anthropic Launches Claude Haiku 4.5: Small AI Model That Delivers Sonnet-4-Diploma Coding Effectivity At One-Third The Value And Better Than Twice The Velocity

Anthropic launched Claude Haiku 4.5, a latency-optimized “small” model that delivers associated ranges of coding effectivity to Claude Sonnet 4 whereas working higher than twice as fast at one-third the charge. The model is right away obtainable via Anthropic’s API and in affiliate catalogs on Amazon Bedrock and Google Cloud Vertex AI. Pricing is $1/MTok enter and $5/MTok output. Anthropic positions Haiku 4.5 as a drop-in substitute for Haiku 3.5 and Sonnet 4 in cost-sensitive, interactive workloads.

Positioning and lineup

Haiku 4.5 targets real-time assistants, customer-support automations, and pair-programming the place tight latency budgets and throughput dominate. It surpasses Sonnet 4 on “laptop computer use” duties—the GUI/browser manipulation underpinning merchandise like Claude for Chrome—and is described as materially enhancing responsiveness in Claude Code for multi-agent duties and speedy prototyping. Anthropic makes clear that Sonnet 4.5 stays the frontier model and “the perfect coding model on the planet,” whereas Haiku 4.5 presents near-frontier effectivity with bigger cost-efficiency. A useful pattern is Sonnet 4.5 for multi-step planning and parallel execution by a pool of Haiku 4.5 staff.

Availability, identifiers, and pricing

From day one, builders can title the model (claude-haiku-4-5) on Anthropic’s API. Anthropic moreover states availability on Amazon Bedrock and Vertex AI; model catalogs would possibly exchange space safety and IDs over time, nevertheless the agency confirms cloud availability inside the launch publish. The API worth for Haiku 4.5 is $1/MTok (enter) and $5/MTok (output), with prompt-caching listed at $1.25/MTok write and $0.10/MTok be taught.

Benchmarks

Anthropic summarizes outcomes all through commonplace and agentic suites and comprises methodology particulars to qualify the numbers:

• SWE-bench Verified: straightforward scaffold with two devices (bash, file edits), 73.3% averaged over 50 trials, no test-time compute, 128K contemplating funds, default sampling. Includes a minor fast addendum encouraging intensive gadget use and writing assessments first.
• Terminal-Bench: Terminus-2 agent, widespread over 11 runs (6 with out contemplating, 5 with 32K contemplating funds).
• OSWorld-Verified: 100 max steps, averaged all through 4 runs with a 128K complete contemplating funds and 2K per-step configuration.
• AIME / MMMLU: averages over plenty of runs using default sampling and 128K contemplating budgets.

The publish emphasizes coding parity with Sonnet 4 and computer-use useful properties relative to Sonnet 4 beneath these scaffolds. Clients ought to duplicate with their very personal orchestration, gadget stacks, and contemplating budgets sooner than generalizing.

Key Takeaways

• Haiku 4.5 delivers Sonnet-4-level coding effectivity at one-third the charge and higher than twice the tempo.
• It surpasses Sonnet 4 on computer-use duties, enhancing responsiveness in Claude for Chrome and multi-agent flows in Claude Code.
• Actually useful orchestration: use Sonnet 4.5 for multi-step planning and parallelize execution with plenty of Haiku 4.5 staff.
• Pricing is $1/$5 per million enter/output tokens; obtainable via Claude API, Amazon Bedrock, and Google Cloud Vertex AI.
• Launched beneath ASL-2 with a lower measured misalignment cost than Sonnet 4.5 and Opus 4.1 in Anthropic’s assessments.

Anthropic’s positioning of Claude Haiku 4.5 is strategically sound: by delivering associated ranges of coding effectivity to Claude Sonnet 4 at one-third the charge and higher than twice the tempo, whereas surpassing Sonnet 4 on laptop computer use, the company affords devs a transparent planner–executor break up—Sonnet 4.5 for multi-step planning and a pool of Haiku 4.5 staff for parallel execution—with out forcing architectural modifications (“drop-in substitute” all through API, Amazon Bedrock, Vertex AI). The ASL-2 launch, coupled with a documented lower misalignment cost than Sonnet 4.5 and Opus 4.1, lowers the friction for enterprise rollout the place safety gates and worth envelopes dominate deployment math.

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