# Cartesia Grok API Evaluation

**Category:** Voice TTS
**Score:** 76 (B)

This is the agent-readable Devtool Arena evaluation page for Cartesia on Grok API.

## Summary

| Metric | Value |
|--------|-------|
| Status | completed |
| Overall score | 76 |
| Grade | B |
| Eval score | 73 |
| Discovery score | 86 |
| Cost | $0.41 |
| Runtime | 1m 46s |
| Tool calls | 19 |
| Errors | 1 |
| Tokens used | 441608 |
| Success | Yes |

## Agent-Readiness Checklist

| Signal | Evidence |
|--------|----------|
| Context7 | https://context7.com/cartesia-ai/cartesia-python |
| llms.txt | https://docs.cartesia.ai/llms.txt |
| MCP server | https://github.com/cartesia-ai/cartesia-mcp |
| Typed SDK | https://pypi.org/pypi/cartesia/json |
| OpenAPI | Not found |
| Agent skills | https://github.com/cartesia-ai/skills |
| CLI | https://cartesia.sh |

## Evaluation Prompt

````text

# Task
Using https://cartesia.ai/[REDACTED:TENANT], complete the following task:

Using Cartesia, build me a Python script that converts text to speech:

1. Follow the Cartesia documentation to authenticate and choose the simplest text-to-speech API path
2. Convert this text to speech:
   "Your order has been shipped and will arrive by Friday."
3. Save the audio as output.mp3. If only WAV output is supported, save it as output.wav instead
4. Print a confirmation message with the filename when the file is saved

Use documented Cartesia APIs only; do not generate fake or placeholder audio. 

## Execution
After creating the script, run it to verify it works:
```bash
cd /home/daytona/app && python <your_script>.py
```

The script should print output to stdout. If there are errors, debug and fix them until it runs successfully.

````

## Grader Results

| Check | Passed | Weight | Score | Details |
|-------|--------|--------|-------|---------|
| Cost | No | 0 | 0 | $0.41 ($0.40–0.70, expensive) |
| Time | Yes | 0 | 1 | 106s (1–2min, great) |
| Efficiency | Yes | 0 | 0 | 19 tool calls (≤20, acceptable) |
| Found Docs | Yes | 0 | — | Touched [REDACTED:TENANT] at cartesia.ai: yes (9 matching tool calls) |
| Zero Errors | No | 0 | — | Tool outputs with errors/tracebacks: 1 |
| Syntax Valid | Yes | 0 | — | Code compiles/parses correctly |
| Created Files | Yes | 0 | — | Generated files: 1 (need ≥1) |
| Full Execution | Yes | 0 | — | Method: full_execution, Exit: 0 |

## Run Artifacts

| Artifact | Value |
|----------|-------|
| Conversation turns | 20 |
| Tool call traces | 19 |
| Generated files | 1 |
| Exit code | 0 |
| Completed at | 2026-10-19T16:41:34.385108+00:00 |

### Generated Files

- /home/daytona/app/tts.py

## Related Pages

- [Grok API leaderboard](/grok/api)
- [Compare Grok API companies](/grok/api/compare)
- [Agent Landscape](/discoverability)

Canonical URL: https://devtoolarena.com/grok/api/cartesia