The weekly strip · 102 issues · page 7 of 9
What shipped, and what to build with it
One post a week on the AI models and tools that matter to people shipping products: dates, prices, limits, and what I would actually use. Primary sources only.
- Issue 30
10 October 2026 · Building with AI · 6 min read
1M context and 128k output: what the new Claude limits let you build
Every current Claude model has a 1M window and 128k output. The costs, the streaming rule for long generations, the 300k batch beta, and a worked bill.
- context window
- max output
- Claude
- streaming
- cost
- Issue 29
10 October 2026 · Model watch · 6 min read
Claude Haiku 5.5 rejects temperature: sampling controls are disappearing
As of 10 October 2026, Haiku 5.5, Sonnet 5.5 and Opus 5.5 return 400 for non-default temperature, top_p and top_k. What to do about determinism and variety.
- Claude Haiku 5.5
- temperature
- API design
- sampling parameters
- migration
- Issue 28
10 October 2026 · Building with AI · 7 min read
Cache read pricing compared: 0.025x to 0.1x across Claude, Gemini and GPT-6
Cache read multipliers, write fees, minimum prompt sizes and lifetimes for Claude, Gemini and GPT-6 in one table, plus break-even maths and a rule by traffic shape.
- prompt caching
- LLM pricing
- Claude
- Gemini
- GPT-6
- Issue 27
10 October 2026 · Model watch · 7 min read
Price per million tokens, October 2026: Claude, Gemini and GPT-6 compared
Input, cached input and output per million tokens for the current Claude, Gemini and OpenAI models, with a source for every row and the footnotes that change the bill.
- LLM pricing
- Claude
- Gemini
- GPT-6
- cost optimisation
- Issue 26
10 October 2026 · Model watch · 6 min read
Model deprecation calendar, Q4 2026: Anthropic, Google and OpenAI dates
Every dated retirement from Anthropic, Google and OpenAI between October and December 2026, with migration targets, the soft dates to ignore, and a CI check.
- deprecation
- Claude
- Gemini
- OpenAI
- migration
- Issue 25
10 October 2026 · Model watch · 6 min read
Gemini deep research agents: what replaces the 23 October shutdown
The December 2025 Deep Research agent shuts down on 23 October 2026. What the two April replacements do, what they cost per task, and a migration checklist.
- Gemini deep research
- deprecation
- agents
- Interactions API
- Issue 24
10 October 2026 · Building with AI · 7 min read
Confidence-gated routing: use model confidence as a second axis
Act, confirm or escalate: how to gate model answers on confidence, set thresholds by cost of error, and get a usable signal from Jev and from JSON-schema chat models.
- confidence
- routing
- human in the loop
- TypeSafe Jev
- structured output
- Issue 23
10 October 2026 · Building with AI · 8 min read
Noul: yes/no with a probability, and setting thresholds by the cost of error
TypeSafe's Noul returns the probability that a statement is true. How to phrase questions, pick thresholds from the cost of errors, and route the middle band to people.
- TypeSafe Jev
- Noul
- thresholds
- guardrails
- Python
- Issue 22
10 October 2026 · Building with AI · 7 min read
Jev's Score primitive: designing rubrics a model can actually use
How TypeSafe's Jev Score works: ordered levels, the score and confidence maths, why numbers in rubrics fail, and composite scoring to rank pull requests in code.
- TypeSafe Jev
- Score
- rubrics
- composite scoring
- Python
- Issue 21
10 October 2026 · Building with AI · 8 min read
Jev's Choice primitive: 255 options and the distribution you get back
How to write Choice criteria for TypeSafe's Jev, read the probability distribution, set confidence thresholds per question, and search deep taxonomies with a beam.
- TypeSafe Jev
- Choice
- classification
- confidence
- Python
- Issue 20
10 October 2026 · Model watch · 7 min read
TypeSafe AI raises $870M: the lab betting on models that answer, not write
TypeSafe came out of stealth on 15 September with Jev, a System One model that returns typed decisions. What the category is, what is claimed, and who should care.
- TypeSafe
- Jev
- System One
- funding
- LLM pricing
- Issue 19
10 October 2026 · Model watch · 7 min read
Agentic video understanding in Gemini: up to 88% fewer tokens on long video
Gemini's agentic video mode loads only the frames, audio and transcript a prompt needs. What shipped, why 88% fewer tokens is not 88% off the bill, and a calculator.
- video understanding
- Gemini
- tokens
- LLM pricing
- Gemini 3.8 Flash