How do you start calling GPT-4?

Use the model ID gpt-4 through the OpenAI-compatible chat completions endpoint. Text input is supported.

What is the rate limit for gpt-4?

gpt-4 rate limits vary by your MixRoute subscription plan. Check your plan details in the console for requests per minute (RPM) and tokens per minute (TPM) limits. Run a small load test before production to confirm your effective quota.

What should you evaluate before moving production traffic to GPT-4?

Test your specific tasks and compare with newer models like GPT-4o and GPT-4.1, which offer improved speed and cost efficiency. Confirm GPT-4 meets your accuracy requirements.

When was GPT-4 released, and is it still maintained?

GPT-4 was released on 2023-05-28. Its catalog status is stable. Check the model page for deprecation notices before you build a long-lived integration on it.

How do you get a cache hit on gpt-4?

To get a cache hit on gpt-4, send requests with identical prompt prefixes. The cache is keyed by the beginning of your prompt; as long as the prefix matches a previous request, subsequent calls benefit from the lower cached rate. Keep system messages and initial context consistent across calls for best results.

How does gpt-4 compare with other models, and what should you compare?

Compare gpt-4 against models of similar capability and pricing on your actual workload. Evaluate latency, output quality, instruction following, and cost per task. Run side-by-side tests with your own prompts — the best model depends on your specific use case, not just benchmark scores.

How should you set the output budget for gpt-4?

For gpt-4, set the max_tokens or max_completion_tokens parameter to control spending per call. Start with a budget aligned to your typical response length and increase only when longer outputs are genuinely needed. Monitor token usage in the API response headers to tune your budget over time.

Model detail

GPT-4

Provided by OpenAI

Pay-as-you-go

OpenAI's flagship model, GPT-4 is a large-scale multimodal language model capable of solving difficult problems with greater accuracy than previous models due to its broader general knowledge and advanced reasoning capabilities. Training data: up to Sep 2021.

Model specs

Model ID: gpt-4

Context length: 8.192K
Max output: 8.192K
I/O modalities
Released: 2023-05

API endpoints

One MixRoute gateway, OpenAI-compatible

OpenAI-compatible /v1/chat/completions POST

Pricing

Flat rate, unit: /1M Tokens

Input

$30.0000 /1M Tokens

Completion

$60.0000 /1M Tokens

Cache read

$15.0000 /1M Tokens

Selection summary

Quickly judge whether it fits your workload

What is this model good for?

Difficult problems requiring high accuracy and broad knowledge

Use GPT-4 for complex problem-solving, text-based tasks, and applications requiring greater accuracy than previous models. It is a large-scale model capable of handling difficult reasoning across domains.

What should you check before using it?

Consider newer models for better cost and performance

GPT-4 is an older flagship model. Newer models like GPT-4o and GPT-4.1 offer improved speed and cost efficiency. Test your workload to confirm GPT-4 is the right fit.

Why use it through MixRoute?

Swap the base URL, keep the GPT-4 client

MixRoute serves GPT-4 on the OpenAI-compatible endpoint /v1/chat/completions; point your existing client at https://api.mixroute.ai/v1 with the model ID gpt-4 and re-run your integration tests.

Capabilities & compatibility

Unconfirmed capabilities stay "Unknown," no guesses

Structured output

GPT-4 can produce JSON-formatted output on demand.

EX response_format: { type: "json_schema" } forces valid JSON output.

Streaming

GPT-4 supports streamed responses.

EX stream: true streams tokens incrementally, so chat UIs render as they arrive.

OpenAI SDK

Call GPT-4 through MixRoute's OpenAI-compatible endpoint.

EX Change base_url to https://api.mixroute.ai/v1; everything else follows the OpenAI style.

Token cost estimator

Live estimate from this page's pricing, not an actual bill

Input tokens Max per request 8.192K

Output tokens Max per request 8.192K

Requests / month

Cache hit rate 0%

Share of the same prefix read repeatedly, up to 100%

FAQ

GPT-4 is OpenAI’s flagship large-scale language model, capable of solving difficult problems with greater accuracy than previous models. It accepts text input.

Get started

01

Create an API key

Generate a key in the Console; one key calls every model.
02

Set the base URL

Fully OpenAI SDK-compatible; just swap the URL to connect.

https://api.mixroute.ai/v1
03

Specify the model ID

In the request's model field, enter:

gpt-4

Create an API key

New users get $5 in free credits

Test this model and alternate routes with the same request format

Start from a real workload, then let quality, total cost, and failure conditions decide whether to send production traffic.

Create an API key View integration docs