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OpenRouter model

Anthropic: Claude Haiku 4.5

Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance...

Provider
OpenRouter
Availability
Available
Model ID
anthropic/claude-haiku-4.5
Snapshot
2026-10-07
Evaluation Verdict

Claude Haiku 4.5 delivers 52.4% on SWE-bench Verified with rapid execution, offering high-velocity, low-cost autonomous coding and AST navigation for Swarm subagent swarms.

Anthropic: Claude Haiku 4.5 Benchmarks & Agentic Accuracy

Verified primary research & developer preference metrics

Primary Sources Verified
SWE-bench Verified
52.4%
StandardAnthropic Technical Card ↗
LiveCodeBench
46.2%
StandardLiveCodeBench ↗
LMSYS Coding Elo
1320Elo
Coding ArenaLMSYS Arena ↗
AIME 2024 / 2025
58%
StandardAnthropic Technical Card ↗
Pricing ($ / 1M tokens)
$1/ $5
$0.1 cached readStandard API Pricing

What This Means in Real Software Development

  • Surpasses Claude 3.5 Sonnet's baseline coding score (52.4% vs 49.0%) while running at more than 2x the throughput.
  • Extremely economical $1.00/M input and $5.00/M output, slashing multi-agent parallel execution costs.
  • Sub-second response times (<350ms TTFT) make it the optimal interactive pairing engine.
  • Flawless file inspection and syntax patching inside git worktrees.

Swarm Multi-Agent Topology

Tier 3: High-Throughput Subagent EngineRole: Coder Subagent

Best Paired With: Claude 3.7 Sonnet as Lead Planner

The perfect balance of cost and coding competency for Stage 1 discovery and Stage 2 implementation jobs.

Git Worktree Isolation Advantage:

Dispatched across multiple worktrees concurrently to parallelize testing and linting.

What Developers & Practitioners Are Saying

Real-world field observations, production strengths, and developer consensus

Field Consensus

"Next-generation compact model from Anthropic, elevating speed and reasoning efficiency for autonomous workflows."

Verified Real-World Strengths

  • 52.4% on SWE-bench Verified at compact model pricing
  • Rapid generation speed with rapid response times
  • Superb adherence to strict type schemas and API interfaces

Production Caveats & Gaps

  • Higher per-token pricing than commodity open-weights models
Benchmark Reality Check

What the benchmark tests: Measures compact agentic coding, automated PR validation, and test generation.

Production caveat: Deploy as a high-speed validator subagent in multi-stage Task Programs.

Primary Sources & Methodology Citations

Anthropic: Claude Haiku 4.5 model overview

Anthropic: Claude Haiku 4.5 is listed in the public Swarm catalog through OpenRouter. This page summarizes the verified catalog fields used by Swarm without claiming real-time access for every provider account.

Provider
OpenRouter
Family
OpenRouter
Context window
200K tokens
Thinking support
off
Availability status
Available
Catalog ID
openrouter/anthropic/claude-haiku-4.5
  • File input
  • Image input
  • Text input
  • Text output
  • Reasoning
  • Tools
  • Structured output
  • JSON

Run Anthropic: Claude Haiku 4.5 in Swarm

Verified CLI workflow & multi-agent architecture

Quickstart Guide →
bash — swarm run
$swarm ctl model set --provider openrouter --model openrouter/anthropic/claude-haiku-4.5

# Or switch interactively inside the terminal TUI:

>/models

Subagent Role Matrix

Assign Anthropic: Claude Haiku 4.5 to specialized system roles in ~/.swarm/config.json:

  • Primary / Planner: Orchestrates full task DAGs and multi-stage pipelines.
  • Coder Subagent: Generates code and unit tests inside private Git worktrees.
  • Finder Subagent: Performs read-only code search, symbol discovery, and mapping.
System Agent Roles →Why Swarm Architecture →
← All OpenRouter models

Public catalog snapshot. Catalog availability is not a real-time provider status or an access guarantee.