Opus 5.5 autonomously produces 36-minute History of Light documentary, racking up $200+ in API costs

itsOmSarraf_ · x · 2026-10-04

• @LLMJunky asked Claude Opus 5.5 to write, produce and create an educational cartoon about the History of Light, with full autonomy over tool use.
• The agent ended up producing a 36-minute film and spending over $200 in API calls — more than the author expected.
• The stack it chose: Gemini 3.8 Flash TTS for narration (excellent), Lyrica 3 for background music (near-perfect), plus GPT Image 2.5, Nano Banana Pro and NB2 Flash for scene imagery and motion graphics explaining electromagnetism concepts.
• Not flawless, but a striking demo of an agent orchestrating multiple generation tools end-to-end to ship a long-form video.

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