Codex 0.166.0 adds GPT-6.1 Terra to its model catalogs (including Vertex AI and Bedrock) and fixes reasoning-tokenThe chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.Full definition → accounting on resume and fork, which previously risked premature context compactionSummarizing an agent's earlier conversation to free room in the context window so a long session can keep going.Full definition →.
Terms in this piece · Glossary
token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
context compaction — Summarizing an agent's earlier conversation to free room in the context window so a long session can keep going.
