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Anthropic launches Claude Haiku 5.5, its latest small AI model

Anthropic says it costs around 75% less to run on average than Haiku 4.5 and improves coding and computer use.

AnthropicAN
Christian SzegedyCS
Boris ChernyBC
142 Sources, 3d ago, first seen 3d ago

TLDR

Anthropic introduced Claude Haiku 5.5 as its cheapest, fastest and most capable small model yet. The company says it costs around 75% less to run on average than Haiku 4.5 and claims improvements in coding, computer use and knowledge work. Cursor says the model is available in its editor, and Arena says it has added Haiku 5.5 to Agent Arena and Code Arena.

Combined views

1.5M

142 Sources, first seen 3d ago

21.4K likes967 comments1.4K saves945 reposts

Combined views

1.5M

142 Sources, first seen 3d ago

21.4K likes967 comments1.4K saves945 reposts

Anthropic introduced Claude Haiku 5.5, describing it as its cheapest, fastest and most capable small model to date. The company says average running costs are about 75% lower than Claude Haiku 4.5.

Featured Source

A second official post describes Haiku 5.5 as a significant improvement across coding, computer use and knowledge work.

Claude Haiku 5.5 is already available in Cursor and Arena.ai. Arena said evaluation scores are still forthcoming.

Sentiment

Positive——Negative

Summary

Not enough discussion yet.

No sentiment analysis available yet.

Useful links

AnthropicAI

Introducing Claude Haiku 5.5

Leonardo Grigorio | Build & Ship with AI · YouTube

Claude Haiku 5.5 Explained: Everything New

Unite.AI

Anthropic Releases Claude Haiku 5.5, Cutting Small-Model API Prices

Fahd Mirza · YouTube

Claude Haiku 5.5: Can Anthropic's Cheapest Model Perform in the Real World?

The Intelligence Desk · YouTube

Claude Haiku 5.5 Costs the Same as GPT-6 Luna. So I Tested Both.

Sentiment

Positive——Negative

Summary

Not enough discussion yet.

No sentiment analysis available yet.

Useful Links

AnthropicAI

Introducing Claude Haiku 5.5

Unite.AI

Anthropic Releases Claude Haiku 5.5, Cutting Small-Model API Prices

Related Videos

  • Claude Haiku 5.5 Explained: Everything NewLeonardo Grigorio | Build & Ship with AI · YouTube
  • Claude Haiku 5.5: Can Anthropic's Cheapest Model Perform in the Real World?Fahd Mirza · YouTube
  • Claude Haiku 5.5 Costs the Same as GPT-6 Luna. So I Tested Both.The Intelligence Desk · YouTube

Useful Links

AnthropicAI

Introducing Claude Haiku 5.5

Unite.AI

Anthropic Releases Claude Haiku 5.5, Cutting Small-Model API Prices

Related Videos

  • Claude Haiku 5.5 Explained: Everything NewLeonardo Grigorio | Build & Ship with AI · YouTube
  • Claude Haiku 5.5: Can Anthropic's Cheapest Model Perform in the Real World?Fahd Mirza · YouTube
  • Claude Haiku 5.5 Costs the Same as GPT-6 Luna. So I Tested Both.The Intelligence Desk · YouTube

Related

Anthropic’s will ban abusive behavior toward Claude starting November 12, 2026

Usage policy update adds new rules and highlights the potential for misuse.

Anthropic’s will ban abusive behavior toward Claude starting November 12, 2026
State of AI report puts AI-assisted AI research in focus

Author Nathan Benaich cites an Anthropic index and argues robotics is nearing a “GPT-2 moment.”

Anthropic expands its Cyber Verification Program for security professionals

Verified professionals can access Mythos 5.1, Opus 5.5 and Sonnet 5.5 with defensive safeguards, Anthropic says.

142 Sources

Tips Excel | AI Productivity@gudanglifehack🗞 Daily AI Brief (2-Min) 🔥GOOGLE : • Gemini app is reshuffling model access: free users drop to Flash-Lite only from Oct 9, AI Plus loses Pro, and AI Pro gains Deep Think. 🔥ALEPH ALPHA : • Kolibri-1 is out as open weights under Apache 2.0: a 78B MoE with 3.46B active parameters, built for German/English sovereign deployments. 🔥ANTHROPIC : • Claude now asks voice users to opt in to sharing voice data for model training, via a separate privacy toggle that is off by default. 🔥OPENAI : • GPT-6.1 Sol Ultrafast is coming soon, per Codex lead Tibo Sottiaux. • Safety lead David Robinson resigned, writing in The Atlantic that OpenAI's "culture is broken." 🔥MISTRAL : • Mistral is working on its own Voice Mode, which looks TTS-based for now. 🔥META : • Meta is building an "Agent Engine" for its Meta API Platform, codenamed Forge internally. It'll allow developers to build and run AI agents directly on its own infrastructure.3d
Marcus Schuler@MarcusSchulerMusk says Grok Bot will route tasks to Claude Opus 5.5, Midjourney, and Suno. Enterprise contracts with subprocessor restrictions need to verify terms before deployment. No rollout timeline or performance data yet. https://www.implicator.ai/grok-bot-claude-model-routing/3d
Wessel van Keulen@wesselvkHow Grok @bot picks a model, straight from Elon. Simple questions go to small, fast models. Questions that need a long, complex answer go to the big ones. That is the routing behind this morning's news that @bot can call Claude Opus 5.5, MidJourney, Suno and other outside models. Best answer for the task, at the right speed.3d
Chubby♨️@kimmonismusClaude Haiku 5.5 is probably being released today. Already fund in the latest Claude Code update. Super curious how good it is. I expect it close-ish to Sonnet but far cheaper, probably Luna-pricing.2d
Andrew Curran@AndrewCurran_Haiku 5.5 is live for me right now.2d
Lisan al Gaib@scaling01it's cheap af2d
Claude@claudeaiIntroducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released. On average, it costs around 75% less to run than Claude Haiku 4.5.2d
Anthropic@AnthropicAIClaude Haiku 5.5, our latest model:2d
Stats Wire@StatsWireLEAK: Claude Haiku 5.5 pricing just surfaced Under 100K tokens: • $0.10 input • $0.50 output That’s the exact same price as GPT-6 Luna. Anthropic is matching OpenAI’s cheapest model…2d
Mike Krieger@mikeykAnother model joins the 5.5 family with the small but mighty Haiku 5.5! It’s built for speed and efficiency, and costs 75% less than Haiku 4.5. Opus does the heavy thinking, Haiku does the high-volume work, and together you get more done for less. Happy shipping!2d
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    142 Sources

    Tips Excel | AI Productivity@gudanglifehack🗞 Daily AI Brief (2-Min) 🔥GOOGLE : • Gemini app is reshuffling model access: free users drop to Flash-Lite only from Oct 9, AI Plus loses Pro, and AI Pro gains Deep Think. 🔥ALEPH ALPHA : • Kolibri-1 is out as open weights under Apache 2.0: a 78B MoE with 3.46B active parameters, built for German/English sovereign deployments. 🔥ANTHROPIC : • Claude now asks voice users to opt in to sharing voice data for model training, via a separate privacy toggle that is off by default. 🔥OPENAI : • GPT-6.1 Sol Ultrafast is coming soon, per Codex lead Tibo Sottiaux. • Safety lead David Robinson resigned, writing in The Atlantic that OpenAI's "culture is broken." 🔥MISTRAL : • Mistral is working on its own Voice Mode, which looks TTS-based for now. 🔥META : • Meta is building an "Agent Engine" for its Meta API Platform, codenamed Forge internally. It'll allow developers to build and run AI agents directly on its own infrastructure.3d
    Marcus Schuler@MarcusSchulerMusk says Grok Bot will route tasks to Claude Opus 5.5, Midjourney, and Suno. Enterprise contracts with subprocessor restrictions need to verify terms before deployment. No rollout timeline or performance data yet. https://www.implicator.ai/grok-bot-claude-model-routing/3d
    Wessel van Keulen@wesselvkHow Grok @bot picks a model, straight from Elon. Simple questions go to small, fast models. Questions that need a long, complex answer go to the big ones. That is the routing behind this morning's news that @bot can call Claude Opus 5.5, MidJourney, Suno and other outside models. Best answer for the task, at the right speed.3d
    Chubby♨️@kimmonismusClaude Haiku 5.5 is probably being released today. Already fund in the latest Claude Code update. Super curious how good it is. I expect it close-ish to Sonnet but far cheaper, probably Luna-pricing.2d
    Andrew Curran@AndrewCurran_Haiku 5.5 is live for me right now.2d
    Lisan al Gaib@scaling01it's cheap af2d
    Claude@claudeaiIntroducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released. On average, it costs around 75% less to run than Claude Haiku 4.5.2d
    Anthropic@AnthropicAIClaude Haiku 5.5, our latest model:2d
    Stats Wire@StatsWireLEAK: Claude Haiku 5.5 pricing just surfaced Under 100K tokens: • $0.10 input • $0.50 output That’s the exact same price as GPT-6 Luna. Anthropic is matching OpenAI’s cheapest model…2d
    Mike Krieger@mikeykAnother model joins the 5.5 family with the small but mighty Haiku 5.5! It’s built for speed and efficiency, and costs 75% less than Haiku 4.5. Opus does the heavy thinking, Haiku does the high-volume work, and together you get more done for less. Happy shipping!2d
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