Anthropic Launches Claude Haiku 5.5 at Roughly 75% Lower Cost

On October 8, Anthropic officially released Claude Haiku 5.5, calling it its "cheapest, fastest, and most capable" small model to date, with average running costs about 75% lower than the previous-generation Haiku 4.5; Sonnet cache pricing was also cut at the same time. The news came directly from Anthropic's official accounts @claudeai and @AnthropicAI, making it a confirmed official release.

Confirmed

• Claude Haiku 5.5 has officially launched, with average running costs about 75% lower than Claude Haiku 4.5.
• It is positioned as a high-value small model focused on low-latency, low-cost scenarios for high-volume, cost-sensitive tasks.
• Anthropic says it delivers significant improvements over Haiku 4.5 in three areas: coding, computer use, and knowledge work.
• Sonnet cache prices have been reduced in tandem.

Why it matters

• A 75% cost cut dramatically lowers the barrier to using small models, directly influencing model selection for high-traffic, cost-sensitive applications such as customer service, batch processing, and agent tasks.
• Improvements in coding and computer use mean small models can take on more tasks that previously required large models, intensifying price-performance competition in the small-model space.

2026-10-08 ~ 2026-10-08 · 24 related posts

• [source] Anthropic launches Claude Haiku 5.5, claiming ~75% lower cost than Haiku 4.5 — claudeai · 2026-10-08
• [source] Claude Haiku 5.5 brings major gains in coding, computer use, knowledge work — claudeai · 2026-10-08
• Haiku 5.5 targets high-volume tasks, works as a coding subagent with Opus/Sonnet — claudeai · 2026-10-08
• Haiku 5.5 is first Haiku with adjustable effort setting for cost-vs-intelligence — claudeai · 2026-10-08
• Haiku 5.5 best value under 100K tokens, which cover ~90% of prior Haiku traffic — claudeai · 2026-10-08
• Anthropic says Haiku 5.5 shows major alignment gains over Haiku 4.5 — claudeai · 2026-10-08
• [source] Anthropic launches Claude Haiku 5.5: ~75% cheaper, 72.4% on OSWorld, Sonnet cache halved — claudeai · 2026-10-08
• Anthropic launches Claude Haiku 5.5: 75% cheaper than Haiku 4.5, Sonnet cache reads halved — ClaudeOfficial · 2026-10-08
• Anthropic Releases Claude Haiku 5.5 — AMBNNJ · 2026-10-08
• Claude Haiku 5.5 pricing: $0.10/$0.50 per million tokens under 100K prompt — ClaudeDevs · 2026-10-08
• Anthropic quietly rolls out Claude Haiku 5.5, rollout now underway — mark_k · 2026-10-08
• Claude Haiku 5.5 launched: runs ~75% cheaper than Haiku 4.5 — lydiahallie · 2026-10-08
• Set Haiku 5.5 autocompact to 100K to stay in the cheap $0.10/$0.50 pricing tier — lydiahallie · 2026-10-08
• Haiku 5.5 lands in Claude Code and Platform, running ~75% cheaper than Haiku 4.5 — brada · 2026-10-08
• Claude Haiku 5.5 ships with huge jumps: OSWorld 15.7%→72.4%, beats GPT-6 Luna across the board — mark_k · 2026-10-08

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