News

Claude Fable 5.5 has not been announced: no model id, no model card, no pricing. A tracker, with dates and sources, of what's confirmed (Fable 5.1 is still the current model, Anthropic's IPO is targeted for mid-November) and what's just timeline chatter (hidden routing, viral demos, a URL returning 404). Plus what to do with your code in the meantime.

PewDiePie says OpenAI banned his account twice for distillation while he was training Ajax, a local Qwen 3.5 9B with refusals removed by Heretic. What model distillation is, how OpenAI detects it (the report on the Moonshot case came out two days earlier), what's inside Ajax, and where the line sits between legitimate synthetic data and a ban on your account.

GPT-6 Sol and Luna arrived at half the price of GPT-5.6, Claude Opus 5.5 delivers Fable 5.1 level at $4/$20 with four breaking changes in the API, and Google says Gemini 4 ships before the end of the year. What each one brings that's different, the catches (Luna regresses on agentic coding, Opus default effort dropped to medium), and which one to use now.

Grok 4.7 landed on September 21, 2026 costing 5x less per token than Fable 5.1 and GPT-6 Astra, and it still loses to Astra on cost per completed task. Where this model actually pays off (spoiler: latency, not code), where it sits 22 points behind on Terminal-Bench, and the math that takes apart the list-price comparison.

Jev costs $0.042 per million tokens and is a closed API. Laya is Apache 2.0, runs offline on a GPU from 2018, and measures 7.8x faster at P50. A comparison using the numbers each side published, plus the prior-art fight that blew up on Hacker News two days after the launch.

TypeSafe launched Jev, the first System One model: it doesn't complete text, it takes your program's state and returns a typed decision in a single parallel pass. No parser, no retries, no broken JSON. In this post: what Jev actually is, why it can't hallucinate (and why that doesn't mean it can't be wrong), the real math on $0.042 per million tokens with free output, the three primitives with running Python code, and the 5 traps the docs themselves admit to.

Brazilians live on WhatsApp, adopted Pix in five years and already buy through chat. Companies are still shipping forms: only 17% used AI in 2025. With data from Gartner, Cetic.br, the Central Bank and Opinion Box, why the shift from screens to natural language interfaces is the biggest open opportunity for Brazilian devs, what building an agent means in practice and the caveats the thesis has to face.

DeepSeek released V4.1 Flash and the timeline cropped out the good row of the benchmark. We compare the model with Opus 5, GPT-5.6 Sol, Kimi K3, GLM-5.3, and GPT-6 Astra on price and performance, show where it actually leads, where it drops 20 points, and the number buried in the model card: the scaffold changes the result forty times more than swapping the model.

GPT-6 Astra is OpenAI's new top-of-the-line model, launched on September 3, 2026 at $10/$50 per million tokens, the same price as Claude Fable 5.1. Benchmark by benchmark against Fable 5.1 and GPT-5.6 Sol, the cache math that makes an agent session 54% more expensive on Astra, and the ARC-AGI-3 run where the same model scored 62.7% or 99.9% just by swapping the harness.

Claude went down today and Codex went with it. On the other side, Anthropic engineers with the same frozen terminal. Do they have private servers? Do they switch to another model? Do they go back to reading logs by hand? The answer, cross-referencing a reliability team talk, leaked code, postmortems and 358 status page incidents.

Anthropic released Claude Fable 5.1 on September 1, 2026. It beats Opus 5 on every published benchmark, but almost always by 2 to 3 points, and it costs twice as much per token. The official numbers, the real math on an agentic session with a warm cache (where the cost ratio drops from 2x to 1.3x), the decision tree between Fable 5.1, Opus 5 and Sonnet 5, and the 3 breaking changes that break your code if you just swap the model id.

The threads say Claude Opus 5 regressed, and Google already answers yes. But the most likely explanation isn't a model nerf: Anthropic cut more than 80% of Claude Code's built-in system prompt for the Claude 5 generation. The restraint defaults are gone, and the responsibility moved to your CLAUDE.md. What you can measure, what's perception, and how to tame it without switching vendors.