AI Recommendation
Should you use gpt-4o?
gpt-4o is listed for chat workloads and supports a 128K context window.
Use it when GitHub Models's free tier is enough for evaluation, demos, or light production traffic.
gpt-4o Free API on GitHub Models
Free API Available from GitHub Models
Omni-era GPT for multimodal chat, practical coding, and general assistants
Free APIOpenAI compatibleTool callingJSON modePDF inputTextImage
API Details
Copy-ready connection details
Base URL
https://models.github.ai/inference Model ID
gpt-4o API format OpenAI Chat Completions
Technical Details
gpt-4o specifications
Context window 128K
Max output 16K
Status Online
Family gpt
Knowledge cutoff 2023-09
Released May 13, 2024
Last updated Aug 6, 2026
Free listing since May 13, 2024
Input text, image, pdf
Output text
Capabilities tool calling, structured output, file attachments, temperature control
External benchmark references
| Benchmark | Score | Metric | Date |
|---|---|---|---|
| Aider Polyglot | 23.1 | percent correct | 2024-12-30 |
Best for
- Chat
Strengths & Weaknesses
Strengths
- Long context window
- Tool calling support
- Structured JSON output
- Works with OpenAI-style SDKs
Watch outs
- Free-tier rate limits apply
Benchmark Overview
Benchmark signals for gpt-4o
Intelligence General reasoning and instruction following
8.6/100 Coding Programming and code generation
24.2/100 Speed Observed generation speed
70 tok/s Context Maximum listed context window
128K Pricing
gpt-4o pricing per 1M tokens
Input $5 per 1M tokens
Output $15 per 1M tokens
Free access Available GitHub Models
Rate limit 10 RPM, 50 RPD provider policy
Availability
gpt-4o availability by provider
We only found this gpt-4o listing on GitHub Models in the current catalog. Use the related models section for nearby alternatives.
| Provider | Model listing | Access | Context | API | Limits |
|---|---|---|---|---|---|
| | gpt-4o | Free tier | 128K | OpenAI-style | 10 RPM, 50 RPD |
Compare
gpt-4o alternatives to consider
| Model | Provider | Context | Access |
|---|---|---|---|
| Phi-4 | GitHub Models | 131K | Free tier |
| Mistral Large (24.11) | GitHub Models | 131K | Free tier |
| AI21 Jamba 1.5 Large | GitHub Models | 256K | Free tier |
| gpt-5 | GitHub Models | 200K | Free tier |
| gpt-4.1 | GitHub Models | 1.0M | Free tier |
Typical Use Cases
gpt-4o use cases
Chat
gpt-4o is tagged for chat in this catalog and works with OpenAI-compatible client libraries.
FAQ
gpt-4o free API FAQ
Is gpt-4o free to use?
gpt-4o is listed with free API access on GitHub Models, subject to the provider's quota and account policy.
What is the gpt-4o model ID?
The model ID shown in this catalog is gpt-4o.
What are the gpt-4o free tier rate limits on GitHub Models?
The listed free tier limit is 10 RPM, 50 RPD. Limits can change per account tier, so confirm against the provider dashboard.
What context window does gpt-4o support?
The listed context window is 128K tokens with up to 16K output tokens.
More about gpt-4o
GPT-4o is OpenAI's flagship multimodal model, available for free via GitHub Models with no credit card — just a GitHub account. While it supports image inputs natively on OpenAI's own API, the GitHub Models free tier currently serves the text-only path with 128K context and 16K max output. Rate limits are 10 RPM and 50 requests per day, and per-request caps of 8K input / 4K output tokens apply, so it is best for prompt engineering, model evaluation, and personal projects. Fully OpenAI SDK-compatible — drop in the GitHub Models base URL and your GitHub token, and existing OpenAI SDK code works unchanged.
For API keys, setup steps, and provider-level limits, see the GitHub Models provider page.