Claude Duet keeps working. Your usage limits still apply.
Claude Duet’s background checks share your Claude allowance. I examine the US waitlist, approval rules and the cost of letting an agent decide when to work.
Hands-on notes on AI and software development
Model releases, benchmarks, experiments and guides for developers who work with AI every day. Written from real use, with sources for every claim.
Claude Haiku 5.5 is cheap. Keep its jobs small
Haiku 5.5 starts at $0.10 input, but long prompts cost five times more. I explain the tokenizer change and where this model fits beside Sonnet.
Muse Wonder Full isn't the model in the API
Meta's best Muse Wonder results belong to Full, available through Muse Code subscriptions. I separate model access, benchmark settings and the API bill.
Gemini 4 Argon: strong scores, uneven coding results
Google's Argon leads DeepSWE but trails on other coding tests. I compare the launch benchmarks, million-token output limit and restricted rollout.
ChatGPT dots and Space move work beyond the conversation
OpenAI adds persistent assistants and shared Pages to ChatGPT. I explain what they can do, what access they need and why Pro users in the EU must wait.
Claude Sonnet 5.5: maximum effort can cost more than Opus
Sonnet 5.5 keeps its token prices and generates output faster. Independent tests show why maximum effort can make the cheaper model cost more per task.
GPT-6.1 Sol gets close to Astra at a lower task cost
Independent tests put Sol 6.1 close to Astra at a much lower cost per task. I compare the evidence, API rates and the first Reddit reactions.
OpenAI confirms an Agents API container billing bug
A Reddit user reported a $1,600 Agents API bill. OpenAI confirmed container overbilling. I separate the resolved incident from the cleanup work apps need.
GLM improved its inference. Engineers still set the goal
Z.ai reports 3× serving throughput with help from a GLM coding agent. I examine what improved, what humans controlled, and what developers can reuse.
GPT-6 Sol and Luna: the price cut is the upgrade
GPT-6 Sol and Luna cut API prices while independent benchmarks show smaller gains. I compare the scores, ChatGPT access, and mixed first reports on Reddit.
Opus 5.5 improves coding. Task cost is less clear
Opus 5.5 gains ground in independent coding tests and cuts token prices. I compare the task costs, effort settings, and first Reddit reports on daily use.
Claude leads 26% of AI R&D at Anthropic. Who checks it?
Anthropic says Claude leads a quarter of its AI research work under human supervision. I look at what the figure measures and who still checks the results.
All articles
Releases
- Claude Duet keeps working. Your usage limits still apply.
- Claude Haiku 5.5 is cheap. Keep its jobs small
- Muse Wonder Full isn't the model in the API
- Gemini 4 Argon: strong scores, uneven coding results
- ChatGPT dots and Space move work beyond the conversation
- Claude Sonnet 5.5: maximum effort can cost more than Opus
- GPT-6.1 Sol gets close to Astra at a lower task cost
- OpenAI confirms an Agents API container billing bug
- GLM improved its inference. Engineers still set the goal
- GPT-6 Sol and Luna: the price cut is the upgrade
- Opus 5.5 improves coding. Task cost is less clear
- Claude leads 26% of AI R&D at Anthropic. Who checks it?
- Codex CLI adds voice. The recovery fixes matter more
- Fable 5.2 rumors: better answers need better evidence
- DeepSeek V4.1 Flash: low API prices, huge open weights
- OpenAI Agents API: what the Codex harness takes over
- GPT-6 Astra costs 2.5x Sol per token. It talks like a person
- Fable 5.1 beats Fable 5. Opus is harder to replace
- Codex Plus can stop work with 84% of weekly usage left
- Claude will watermark its text. The EU is the reason
- Astra is real. A GPT-6 launch this week is not
- Codex resets were a marketing stunt. The problem was real
- DeepSeek V4 Flash lost all 9 benchmarks to Opus 4.8
- Opus 5 is a great employee but a frustrating boss
Benchmarks
Experiments
Guides
- Claude Code weekly limits fell 16.7%. Here's why
- Opus 5 is not as bad as the internet says
- Cursor didn't remove the IDE. Here's how to get it back
- OpenAI's agents turned Artifactory into a message board
- Which merchant of record should you trust? I compared 9
- How founders get their first 1,000 users without ads
- My coding agents forget the repo. I built them a map
- I compared eight Convex alternatives. I'm not switching