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Claude Haiku 4.5

anthropic.com

121–130 of 292 posts

Re: Claude Haiku 4.5

#121

Tried it in Claude Code via /config, makes it feel like I'm running on Cerebras. It's seriously fast, bottleneck is on human review at this point.

Do you need Pro?

You can use the model flag and specify the model like: claude --model claude-haiku-4-5-20251001

Re: Claude Haiku 4.5

#122
post #102
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…

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

Re: Claude Haiku 4.5

#124

Ain't nobody got time to pick models and compare features. It's annoying enough having to switch from one LLM ecosystem to another all the time due to vague usage restrictions. I'm paying $20/mo to Anthropic for Claude Code, to OpenAI for Codex, and previously to Cursor for...I don't even know what. I know Cursor lets you select a few different models under the covers, but I have no idea how they differ, nor do I car…

> annoying enough having to switch from one LLM ecosystem to another all the time due to vague usage restrictions

I use KiloCode and what I find amazing is that it'll be working on a problem and then a message will come up about needing to topup the money in my account to continue (or switch to a free model), so I switch to a free model (currently their Code Supernova 1million context) and it doesn't miss a beat and continues working on the problem. I don't know how they do this. It went from using a Claude Sonnet model to this Code Supernova model without missing a beat. Not sure if this is a Kilocode thing or if others do this as well. How does that even work? And this wasn't a trivial problem, it was adding a microcode debugger to a microcoded state machine system (coding in C++).

Re: Claude Haiku 4.5

#125

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?

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 accounts, or decrease the daily limit.

Re: Claude Haiku 4.5

#126
I just don't find the benchmarks on the site here at all believable. codex for me with gpt-5 is so much better then claude any model version. I mean maybe it's because they compare to gpt-5-codex model but they don't mention is that high, medium, low, etc... so it's just misleading probably... but i must reiterate zero loyalty to any AI vendor. 100% what solves the problem more consistently and of a higher quality and currently gpt-5 high - hands down

Re: Claude Haiku 4.5

#127

Ain't nobody got time to pick models and compare features. It's annoying enough having to switch from one LLM ecosystem to another all the time due to vague usage restrictions. I'm paying $20/mo to Anthropic for Claude Code, to OpenAI for Codex, and previously to Cursor for...I don't even know what. I know Cursor lets you select a few different models under the covers, but I have no idea how they differ, nor do I car…

> annoying enough having to switch from one LLM ecosystem to another all the time due to vague usage restrictions I use KiloCode and what I find amazing is that it'll be working on a problem and then a message will come up about needing to topup the money in my account to continue (or switch to a free model), so I switch to a free model (currently their Code Supernova 1million context) and it doesn't miss a beat and…

Models are stateless, why would that not work?

Re: Claude Haiku 4.5

#129
post #52

I am really interested in the future of Opus; is it going to be an absolute monster, and continue to be wildly expensive? Or is the leap from 4 -> 4.5 for it going to be more modest.

I wonder what the next smaller model after Haiku will be called. "Claude Phrase"?

Claude Koan

Re: Claude Haiku 4.5

#130

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?

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".
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