Lesson 1558 of 2116
Function calling strictness modes in Claude, GPT, and Gemini
Strict modes guarantee schema-compliant tool calls — at a quality cost worth measuring.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The premise
- 2function calling
- 3strict mode
- 4JSON schema
Concept cluster
Terms to connect while reading
Section 1
The premise
Strict tool-call modes eliminate parse errors but can hurt the model's reasoning when the schema is over-constrained.
What AI does well here
- Measure tool-call success rate with strict on vs off
- Use strict for safety-critical tools, relaxed for exploratory ones
What AI cannot do
- Get strict mode quality for free — there is always a quality tradeoff
- Replace schema validation on your end
Key terms in this lesson
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