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  "path": "/2026/04/24/llm-prices.html",
  "publishedAt": "2026-04-24T20:42:17.000Z",
  "site": "https://www.manton.org",
  "textContent": "I’ve been trying to find the right balance of AI models to use in Micro.blog. Currently we use a few different flavors of GPT, including OpenAI’s cheaper “flex” version when speed doesn’t matter much, such as in the background work that powers Inkwell’s Reading Recap feature.\n\nAPI pricing is a little all over the map, so I thought I’d capture some of the recent prices here, for OpenAI and Anthropic. I’m including a couple older models too, like the retired GPT-4.5. This is per million tokens, input / output.\n\n\n    GPT-5.5:      $5.00 / $30\n    GPT-5.4:      $2.50 / $15\n    GPT-5.4 Mini: $0.75 / $4.50\n    GPT-5.4 Nano: $0.20 / $1.25\n    GPT-5:        $1.25 / $10\n    GPT-4.5:     $75.00 / $150\n    Opus 4.7:     $5.00 / $25\n    Opus 4.6:     $5.00 / $25\n    Opus 4:      $15.00 / $75\n    Sonnet 4.6:   $3.00 / $15\n    Haiku 4.5:    $1.00 / $5\n\n\nWhat can we learn from this? I have no idea. Clearly GPT-4.5 was a gigantic model, and so OpenAI changed course into more efficient models. Opus has generally been more expensive, but now is comparable to GPT-5.5.",
  "title": "LLM prices"
}