Anthropic just unveiled Claude Haiku 4.5, its fastest and most efficient small model yet. Haiku 4.5 matches the coding performance of Claude Sonnet 4, once a frontier model, but now runs 2x faster and costs one-third as much. I
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Claude has usually been a joy to code with, but recently I’ve been avoiding it because the output has been too verbose. For example, I might ask for a single function definition, and it ends up refactoring the whole codebase. Does this new model address that issue, or is there a way to get more targeted output?
@ashwini_gurbuxani Just ask for less verbose responses. problem solved 😬
🎉 Congratulations on the Claude Haiku 4.5 launch!
Impressive achievement - delivering frontier-level performance at 1/3 the cost and 2x the speed is a game-changer for the industry. The enhanced computer use capabilities and optimization for real-time applications like chat, support, and coding make this particularly exciting for developers.
This perfectly addresses the market need for accessible, high-performance AI. Looking forward to seeing what the community builds with this powerful combination of speed, intelligence, and cost-efficiency.
Well done to the entire Anthropic team! 🚀
Hey Anthropic team — really impressive launch! “Claude Haiku 4.5” seems like a smart step: faster, cheaper, yet still powerful.
A couple suggestions:
It’d be cool if you highlight real use-case benchmarks (e.g. in pair programming, code completion, multi-agent orchestration) so the community can see where it shines vs alternatives.
Consider giving users options to control verbosity or style (for example, lighter vs more detailed code output) sometimes less is more, especially when integrating in pipelines.
Looking forward to seeing what people build with it
Claude Haiku 4.5 is impressive—delivering high coding performance at faster speeds and lower costs is a big win for developers. Do you plan to expand support for more programming languages or integrations?