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Claude Haiku 4.5

anthropic.com

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Re: Claude Haiku 4.5

#171

Post by katchu11 »

Topfi wrote: post #102
Topfi wrote: post #30

Very preliminary testing is very promising, seems far more precise in code changes over GPT-5 models in not ingesting irrelevant to the task at hand code sections for changes which tends to make GPT-5 as a coding assistant take longer than sometimes expected. With that being the case, it is possible that in actual day-to-day use, Haiku 4.5 may be less expensive than the raw cost breakdown may appear initially, though…

Update, Haiku 4.5 is not just very targeted in terms of changes but also really fast. Averaging at 220token/sec is almost double most other models I'd consider comparable (though again, far to early to make a proper judgement) and if this can be kept up, that is a massive value add over other models. That is nearly Gemini 2.5 Flash Lite speed for context. Yes, we got Groq and Cerebras getting up to 1000token/sec, but…

Hey! I work on the Claude Code team. Both PAYG and Subscription usage look to be configured correctly in accordance with the price for Haiku 4.5 ($1/$5 per M I/O tok).

Feel free to DM me your account info on twitter (https://x.com/katchu11) and I can dig deeper!

Re: Claude Haiku 4.5

#172

Post by Aeolun »

visarga wrote: post #91
RickHull wrote: post #13

If I'm close to weekly limits on Claude Code with Anthropic Pro, does that go away or stretch out if I switch to Haiku?

Sonnet 4.5 was two weeks ago. In the past I never had such issues, but every week my quota ended in 2-3 days. I suspect the Sonnet 4.5 model consumes more usage points than old Sonnet 4.1 I am afraid Claude Pro subscription got 3x less usage

Yeah. I definitely don’t get as much usage out of Sonnet 4.5 as 5x Opus 4.1 should imply.

What bothers me is that nobody told me they changed anything. It’s extremely frustrating to feel like I’m being bamboozled, but unable to confirm anything.

I switched to Codex out of spite, but I still like the Claude models more…

Re: Claude Haiku 4.5

#174

Post by peddling-brink »

katchu11 wrote: post #171
Topfi wrote: post #102

Earlier quoted context omitted.

Update, Haiku 4.5 is not just very targeted in terms of changes but also really fast. Averaging at 220token/sec is almost double most other models I'd consider comparable (though again, far to early to make a proper judgement) and if this can be kept up, that is a massive value add over other models. That is nearly Gemini 2.5 Flash Lite speed for context. Yes, we got Groq and Cerebras getting up to 1000token/sec, but…

Hey! I work on the Claude Code team. Both PAYG and Subscription usage look to be configured correctly in accordance with the price for Haiku 4.5 ($1/$5 per M I/O tok). Feel free to DM me your account info on twitter ( https://x.com/katchu11 ) and I can dig deeper!

lol, I don’t know if you work there or not, but directing folks to send their account info to a random Twitter address is, not considered best practice.

Re: Claude Haiku 4.5

#176

Post by thomassmith65 »

__atx__ wrote: post #130
thomassmith65 wrote: post #125

Earlier quoted context omitted.

How close are you? Oh right, Anthropic doesn't tell you. I got that 'close to weekly limits' message for an entire week without ever reaching it, came to the conclusion that it is just a printer industry 'low ink!' tactic, and cancelled my subscription. You don't take money from a customer for a service, and then bar the customer form using that service for multiple days. Either charge more, stop subsidizing free acc…

These days, running `/usage` in Claude Code shows you how close you are to the session and weekly limits. Also available in the web interface settings under "Usage".

My mistake. It's good that it's available in settings, even if it's a few screens away from the 'close to weekly limits' banner nagging me to subscribe to a more expensive plan.

Re: Claude Haiku 4.5

#177

Post by rbitar »

Topfi wrote: post #136
rbitar wrote: post #122

Earlier quoted context omitted.

Where do you get the 220 token/second? Genuinely curious as that would be very impressive for a model comparable to sonnet 4. OpenRouter currently publishing around 116/tps[1] [1] https://openrouter.ai/anthropic/claude-haiku-4.5

Was just about to post that Haiku 4.5 does something I have never encountered before [0], there is a massive delta between token/sec depending on the query. Some variance including task specific is of course nothing new, but never as pronounced and reproducible as here. A few examples, prompted at UTC 21:30-23:00 via T3 Chat [0]: Prompt 1 — 120.65 token/sec — https://t3.chat/share/tgqp1dr0la Prompt 2 — 118.58 token/s…

Interesting and if they are using speculative decoding that variance would make sense. Also your numbers line up with what openrouter is now publishing at 169.1tps [1]

Anthropic mentioned this model is more then twice as fast as claude sonnet 4 [2], which OpenRouter averaged at 61.72 tps for sonnet 4 [3]. If these numbers hold we're really looking at an almost 3x improvement in throughput and less then half the initial latency.

[1] https://openrouter.ai/anthropic/claude-haiku-4.5 [2] https://www.anthropic.com/news/claude-haiku-4-5 [3] https://openrouter.ai/anthropic/claude-sonnet-4

Re: Claude Haiku 4.5

#178

Post by [deleted] »

katchu11 wrote: post #171
Topfi wrote: post #102

Earlier quoted context omitted.

Update, Haiku 4.5 is not just very targeted in terms of changes but also really fast. Averaging at 220token/sec is almost double most other models I'd consider comparable (though again, far to early to make a proper judgement) and if this can be kept up, that is a massive value add over other models. That is nearly Gemini 2.5 Flash Lite speed for context. Yes, we got Groq and Cerebras getting up to 1000token/sec, but…

Hey! I work on the Claude Code team. Both PAYG and Subscription usage look to be configured correctly in accordance with the price for Haiku 4.5 ($1/$5 per M I/O tok). Feel free to DM me your account info on twitter ( https://x.com/katchu11 ) and I can dig deeper!

[deleted]

Re: Claude Haiku 4.5

#180

Post by logankeenan »

matltc wrote: post #110
logankeenan wrote: post #94

I'm not seeing it as a model option in Claude Code for my Pro plan. Perhaps, it'll roll out eventually? Anyone else seeing it with the same plan?

You on latest version? Try running /update hook. Can also config autoupdates

I'm on the binary install with version v2.0.19. It never showed in the `/model` selector UI. I did end up typing `/model haiku` and now it shows as a custom model in the `/model` selector. It shows claude-haiku-4-5-20251001 when selected.
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