Anthropic · Language model

Claude Haiku 5.5

Anthropic's small, fast model. Anthropic says it runs about 75% cheaper than Haiku 4.5 on average, and it keeps a 1M-token context window.

MakerAnthropic
ReleasedOctober 7, 2026
API price (per 1M tokens)$0.1 in / $0.5 out
Open weightsNo

Prompts up to 100K tokens; $0.50 / $2.50 above that.

Best for

  • Sub-agents and high-volume jobs
  • Support bots
  • Cheap long-document work

Strengths

  • $0.10 / $0.50 for prompts under 100K tokens
  • Scores 43 on the Artificial Analysis Intelligence Index at max effort, up from 17 for Haiku 4.5
  • 1M context and 128K output

Watch out for

  • The price rises 5x above 100K tokens
  • Independent Terminal-Bench runs come in below Anthropic's 39.2%

Ranking history

EditionPower RankingsCodingBest ValueOpen-Weight WatchImage GenerationVideo Generation
Week 45, 2026#10 (87)#12 (81)#1 (95)———
Week 44, 2026#8 (88)#10 (81)#1 (95)———
Week 43, 2026#8 (88)#10 (81)#1 (95)———
Week 42, 2026#8 (88)#9 (81)#1 (95)———

Head-to-head