Llm Cost

Meta shipped Muse Spark 1.3 on September 2, 2026: a closed multimodal reasoning model built for long-running agentic workflows, multi-agent setups and coding. Two numbers made the headlines. It scores 75.4 on DeepSWE v1.1, edging past Claude Opus 5, and it hits 98.1% retrieval across a full million tokens of context. Both are real. Both come with a footnote, and the footnotes are what this post is about. What Is Muse Spark 1.3? 🧠 Muse Spark is Meta Superintelligence Labs’ closed flagship series. Version 1.3 succeeds 1.2, and the pitch is not producing one good answer but carrying a long task all the way to the end. ...

Two models, one price tag: $10 per million input tokens, $50 per million output tokens. GPT-6 Astra shipped on September 3, Claude Fable 5.1 on September 1. Identical sticker prices, so the comparison looks simple. It is not. The sticker is the same, the bill is not. Run the same work through both and what you pay can double or halve depending on the shape of your workload. This post starts with where that gap comes from, then walks the benchmark table, and finishes with three concrete billing scenarios. ...

Summary: Five Days of Receipts Finished Portal on its own. 3,336 tool calls, roughly 21 hours, a $571.18 token bill. Launched a rocket in Factorio Space Age 2.1. No model had ever pushed past blue science before. Beat Pokémon in 18h 12m. GPT-5.6 Sol needed 96h 35m for the same run. Scored 19 out of 20 on a robot arm, at $0.94 per attempt. Produced 3,295 editable objects in Blender from a single prompt. What ties them together: every one of these has a price tag, and it is not small. The launch write-up covered the benchmark table, the pricing and the access rules. Five days on, the picture has changed: instead of OpenAI’s slides, we can now look at what people actually got the model to do. ...

Summary: Where to Find Astra Not free. Free and Go plans do not include Astra; their default model stays GPT-5.6 Luna. On Plus, Astra does not appear in regular Chat. Access arrives through ChatGPT Work and Codex. On Pro, Business and Enterprise, it shows up in the model picker under the Pro option, labelled GPT-6 Pro. The model underneath is Astra. Enterprise workspaces get it off by default at launch. An admin has to enable it. Codex CLI 0.153.0 or newer is required, and the desktop app needs updating too. In the API the model id is gpt-6-astra: 1.05M token context, 128K output, $10 in / $50 out per million tokens. Our GPT-6 Astra launch write-up covered what the model is, the benchmark table and the price tag. Two days later the question landing in the inbox is a different one: “I pay for Plus, there is no Astra anywhere in my model picker, where is it?” ...

If you have hit extended thinking and adaptive thinking back to back in Claude’s docs and wondered whether they are the same thing, you are not alone. Short answer: they are not, and you are almost certainly using adaptive thinking already without realizing it 🧠 What Is “Thinking” in Claude? Before answering, Claude can use a scratchpad to reason through the problem on its own. It works step by step, rules out possibilities, does the math, then delivers the final answer. ...