OpenAI's 12-hour prompt caching: when the higher write price pays off
OpenAI now offers a 12-hour cache lifetime at 2.5 times the input price. The break-even point, a worked example, and the billing details to check first.
Blog tag
#LLM costs
What AI usage costs, how to see it and how to keep it under control.
DeepSeek's 1017 update and the model name that moves under you
DeepSeek swapped the model behind deepseek-flash on 17 October, and legacy names followed. Why aliases change agent behaviour, and how to pin and re-test.
Claude API OpenTelemetry export: what the spans hold and how to count them
Anthropic's API can now send OpenTelemetry spans to your own backend. What the content modes capture, how delivery works, and why token counts need care.
Claude Code's idle compaction: a summary instead of a cache rebuild
Claude Code now compacts long idle sessions just before the one-hour prompt cache expires. What that saves, what it costs, and how to see it in telemetry.
Copilot model policies now have a REST API: managing model access as code
GitHub's new endpoints read and set which Copilot models each enterprise, team, app and organisation may use. How the policy states work and what to automate.
The 2026 Stack Overflow survey on AI: cost controls, trust and what to measure
Daily coding agent use is the norm, cost controls are mostly blunt limits, and developers switch tools for quality, not price. What leaders can take from it.
Three Copilot models retire on 16 November: what to check before then
Claude Opus 4.8, Claude Opus 5 and GPT-5.6 Terra leave GitHub Copilot on 16 November 2026. What the replacements cost, and a routine for the next retirement.
Copilot code review in October: who pays, how deep it looks, and what it skips
Balanced is now the default, organisations can take over the bill, and an API arrived. What Copilot code review costs per pull request, and the settings to set.
Infostealers now collect AI coding assistant credentials: what to change
Symantec and Elastic found malware taking AI coding tool credentials from developer machines. What was taken, and how to limit the damage.
Muse Spark Open: what an 816B open-weight coding model asks of you
Meta released weights for Muse Spark Open, an 816B mixture-of-experts model for coding agents: the hardware it needs, its license and its own benchmarks.
Sonnet 5.5's cache-read price cut: what it does to coding agent bills
Anthropic halved Sonnet 5.5 cache reads on 7 October 2026. A worked example of what that means for an agent turn, and why cache misses now matter more.
Sol, Sonnet 5.5 or Haiku 5.5: a practical coding model map
Three coding-relevant models landed within ten days. Rather than picking one default, map task types to model tiers and check vendor benchmarks with care.
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