Sonnet 5.5 is free. Here is when it is the best deal in AI, and the one setting that makes it cost more than Opus

The companion to the video. PAGE 1 — at a glance: Sonnet 5.5 is now the default on the free Claude plan at Medium effort, $2 / $10 per million tokens, a 1M-token context window. PAGE 2 — my test results: seven real jobs, Sonnet 5.5 vs Opus 5.5 vs Sonnet 5 vs GPT-6 Sol, graded by a script. PAGE 3 — Anthropic's claims checked against our numbers. PAGE 4 — the effort rule and the max-effort trap. PAGE 5 — which model to use for which job, plus the watch-outs (security fallback and the API changes). PAGE 6 — sources and honesty notes. Independent guide from Hyperautomation Labs — not affiliated with Anthropic or OpenAI.

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