#gpt

A dark comparison-matrix style cover reading The 2026 LLM Token and Pricing Reset, a 10-part series on GPT-5.6, Claude, and Gemini, listing four row summaries: GPT-5.6's bigger window and pricier caching, Claude Opus 4.8's unchanged price but heavier tokenizer, Gemini 3.6 Flash's fewer tokens and new price, and legacy GPT-4/o1/o4-mini shutting down October 23 2026

The 2026 LLM Token & Pricing Reset: Full Guide

GPT-5.6, Claude Opus 4.8, and Gemini 3.6 all changed token limits and pricing in 2026. Full breakdown of what changed, and how to check your own numbers.

Aug 12, 2026Read more →

A terminal window showing OpenAI's own deprecations page: generally available models get at least 6 months notice before retirement, and gpt-4, gpt-4-0613, o1, o1-pro, and o4-mini all shut down 2026-10-23, replaced by gpt-5.6-sol and gpt-5.6-terra

AI Productivity

gpt-4, o1, and o4-mini Shut Down October 23, 2026

OpenAI's gpt-4, o1, and o4-mini model IDs stop responding on October 23, 2026. The exact deprecation notice, and how to migrate to GPT-5.6.

Aug 12, 2026Read more →

A dark comparison-matrix style cover reading GPT-5.6's Context Window, 922K input and 128K output tokens on o200k_base, listing three row summaries: old context window 128K to 200K tokens, new context window about 1.05M tokens, and this site's token counter not yet supporting o200k_base

AI Productivity

GPT-5.6's Context Window: 922K In, 128K Out Tokens

GPT-5.6 shipped a ~1.05M-token context window (922K input, 128K output) on the o200k_base encoding. What changes for existing integrations.

Aug 12, 2026Read more →

A dark comparison-matrix style cover reading GPT-5.6 Ends Free Prompt-Cache Writes, a 1.25x premium with a 30-minute minimum TTL, listing three row summaries: before automatic free caching, after explicit breakpoints with a 1.25x write cost, and cache reads staying at roughly 90% off unchanged

AI Productivity

GPT-5.6 Ends Free Prompt-Cache Writes (1.25x Premium)

GPT-5.6 replaced OpenAI's free implicit prompt caching with explicit breakpoints and a 1.25x write premium. What changes in your integration.

Aug 12, 2026Read more →

AI Productivity

OpenAI Extends Prompt Cache Retention to 24 Hours

OpenAI extended prompt cache retention from a few minutes to up to 24 hours. What that changes for agents and pipelines with repeated calls.

Aug 12, 2026Read more →

AI Productivity

OpenAI vs Claude: Prompt Caching Cost Math in 2026

OpenAI and Anthropic both charge a 1.25x premium on cache writes; Anthropic's rises to 2x for its 1-hour tier. How the real costs compare.

Aug 12, 2026Read more →

A dark comparison-matrix style cover reading Same Prompt, Different Bill, GPT-5.6 vs Claude Opus 4.8 vs Gemini 3.6, listing three row summaries: GPT-5.6's 922K-token window and pricier caching, Claude Opus 4.8's unchanged price but heavier tokenizer, and Gemini 3.6 Flash's 17% output-token cut and new price

AI Productivity

Same Prompt, Different Bill: GPT-5.6 vs Claude vs Gemini

GPT-5.6, Claude Opus 4.8, and Gemini 3.6 all changed token counts and per-token pricing in 2026. See what shifted, and check your own prompt free.

Aug 11, 2026Read more →