Use Gemini 2.0 Flash (google/gemini-2.0-flash-001).
GPT-5 Mini is overkill here.
~8.3× cheaper per run.
Which AI model should you use to generate TypeScript types from JSON?
Why ->
This task is bounded and predictable, so a smaller model handles it without leaving quality on the table. Reaching for a larger tier here adds cost faster than it improves the output.
Cost breakdown
| Model | Provider | Tier | Input cost | Output cost | Est. / 1k calls |
|---|---|---|---|---|---|
| Gemini 2.0 Flash google/gemini-2.0-flash-001 | Routine | $0.000100 | $0.000400 | $0.15 | |
| GPT-5 Mini openai/gpt-5-mini | Openai | Moderate | $0.000250 | $0.002000 | $1.25 |
Matched signals
- typescript type
- sample
This recommendation is based on the task description alone. If you are attaching a large codebase, mention it in the input above.
Model pricing: OpenRouter model catalog, retrieved April 17, 2026. Classification: rightmodel ruleset v2.
Related tasks
Generate an OpenAPI Schema Example
RoutineDraft an OpenAPI example for a known endpoint shape, fields, and sample response.
Use Gemini 2.0 Flash.
Format a JSON Payload Cleanly
RoutineClean up a JSON payload for readability, validation, or quick inspection during development.
Use Gemini 2.0 Flash.
Migrate JavaScript Module to TypeScript
ModerateConvert a JavaScript module to TypeScript while preserving exports, behaviour, and type safety.
Use GPT-5 Mini.