Error codes, explanations and solutions
Last updated: November 14, 2025
While using the together.ai API you may receive responses with a range of error codes. You can use this article as a reference to assist with troubleshooting the problem before getting in touch with us:
Code | Description | Cause | Solution |
400 | Invalid request | The request to the API is misconfigured | Ensure your request is a Valid JSON and your API Key is correct. Also ensure you're using the right prompt format - which is different for Mistral and LLaMA models. |
401 | Authentication error | The API key is missing or invalid | Ensure you are using the correct API Key and supplying it correctly |
402 | Payment required | The account linked with the API key has reached it's spending limit/run out of credits | Adjust your billing settings or make a payment to resume service. |
403 | Bad request | The combined total of the Input token count and max_tokens parameter must be less than the context length of the model being queried. | Set |
404 | Not found | The endpoint URL or model name is invalid | Check your request is being made to the correct endpoint (see the API reference page for details) and that the model being queried is available |
429 | Rate limit exceeded | Too many requests have been sent in a short period of time | Throttle the rate at which requests are sent to our servers (see our rate limits) |
500 | Server error | There is an unknown server error | This error is caused by an issue with our servers. Please try again. If the issue persists after 30 minutes, please contact us |
503 | Engine overloaded | Our servers are seeing a high amount of traffic | Please try again after a brief wait. If the the issue persists after 30 minutes, please contact us |