Simon Willison’s Weblog

“The king is dead”—Claude 3 surpasses GPT-4 on Chatbot Arena for the first time. I’m quoted in this piece by Benj Edwards for Ars Technica:

“For the first time, the best available models—Opus for advanced tasks, Haiku for cost and efficiency—are from a vendor that isn’t OpenAI. That’s reassuring—we all benefit from a diversity of top vendors in this space. But GPT-4 is over a year old at this point, and it took that year for anyone else to catch up.” # 27th March 2024, 4:58 pm

The Bing Cache thinks GPT-4.5 is coming. I was able to replicate this myself earlier today: searching Bing (or apparently Duck Duck Go) for “openai announces gpt-4.5 turbo” would return a link to a 404 page at openai.com/blog/gpt-4-5-turbo with a search result page snippet that announced 256,000 tokens and knowledge cut-off of June 2024

I thought the knowledge cut-off must have been a hallucination, but someone got a screenshot of it showing up in the search engine snippet which would suggest that it was real text that got captured in a cache somehow.

I guess this means we might see GPT 4.5 in June then? I have trouble believing that OpenAI would release a model in June with a June knowledge cut-off, given how much time they usually spend red-teaming their models before release.

Or maybe it was one of those glitches like when a newspaper accidentally publishes a pre-written obituary for someone who hasn’t died yet—OpenAI may have had a draft post describing a model that doesn’t exist yet and it accidentally got exposed to search crawlers. # 13th March 2024, 2:29 am

The new Claude 3 model family from Anthropic. Claude 3 is out, and comes in three sizes: Opus (the largest), Sonnet and Haiku.

Claude 3 Opus has self-reported benchmark scores that consistently beat GPT-4. This is a really big deal: in the 12+ months since the GPT-4 release no other model has consistently beat it in this way. It’s exciting to finally see that milestone reached by another research group.

The pricing model here is also really interesting. Prices here are per-million-input-tokens / per-million-output-tokens:

Claude 3 Opus: $15 / $75
Claude 3 Sonnet: $3 / $15
Claude 3 Haiku: $0.25 / $1.25

All three models have a 200,000 length context window and support image input in addition to text.

Compare with today’s OpenAI prices:

GPT-4 Turbo (128K): $10 / $30
GPT-4 8K: $30 / $60
GPT-4 32K: $60 / $120
GPT-3.5 Turbo: $0.50 / $1.50

So Opus pricing is comparable with GPT-4, more than GPT-4 Turbo and significantly cheaper than GPT-4 32K... Sonnet is cheaper than all of the GPT-4 models (including GPT-4 Turbo), and Haiku (which has not yet been released to the Claude API) will be cheaper even than GPT-3.5 Turbo.

It will be interesting to see if OpenAI respond with their own price reductions. # 4th March 2024, 6:34 pm