v0.27.0 — Token Inflation Calculator Across Model Versions

Token Inflation Calculator Across Model Versions

Switching model versions can silently increase your token bill. agent-strace inflation measures the tokenizer cost impact before you commit to an upgrade — no API calls required.

agent-strace inflation
agent-strace inflation --compare claude-opus-4-6,claude-opus-4-7 --sessions 30

Applies per-model inflation factors to stored session content and breaks down the impact by content type: system prompt, tool definitions, user messages, assistant messages. Projects per-session, daily, and monthly cost delta.

Known inflation factors (relative to claude-opus-4-6 baseline):

Model	Factor
claude-opus-4-7	1.38× (community median: 1.3–1.47×, April 2026)
gpt-4o	1.05× (cl100k_base → o200k_base)

Prefix matching handles versioned names (e.g. claude-opus-4-7-20260101).