AI21 Jamba 1.5 Large Free API on GitHub Models

Free API

Available from GitHub Models

Catalog profile Reasoning provider catalog metadata

Flagship model for demanding analysis, coding, and production agent workflows

Free APIOpenAI compatibleReasoningTool callingTextReasoning

Try in Playground Compare Save API Key

API Details

Copy-ready connection details

Use these values in your client or SDK.

Base URL

https://models.github.ai/inference

Model ID

AI21-Jamba-1.5-Large

API format OpenAI Chat Completions

Technical Details

AI21 Jamba 1.5 Large specifications

Provider catalog

Context window 256K

Max output 4K

Status Online

Knowledge cutoff 2024-03

Released Aug 29, 2024

Last updated Jul 5, 2026

Free listing since Aug 29, 2024

Input text, reasoning

Output text

Capabilities reasoning, tool calling

AI Recommendation

Should you use AI21 Jamba 1.5 Large?

AI21 Jamba 1.5 Large is listed for chat workloads and supports a 256K context window.

Use it when GitHub Models's free tier is enough for evaluation, demos, or light production traffic.

Best for

Chat

Strengths & Weaknesses

Strengths

Long context window
Reasoning mode listed
Tool calling support
Works with OpenAI-style SDKs

Watch outs

Free-tier rate limits apply
Vision support is not listed

Pricing

AI21 Jamba 1.5 Large pricing per 1M tokens

Free tier listed

Input $0 per 1M tokens

Output $0 per 1M tokens

Free access Available GitHub Models

Rate limit See provider page provider policy

Availability

AI21 Jamba 1.5 Large availability by provider

Current provider only

We only found this AI21 Jamba 1.5 Large listing on GitHub Models in the current catalog. Use the related models section for nearby alternatives.

Provider	Model listing	Access	Context	API	Limits
GitHub Models	AI21 Jamba 1.5 Large	Free tier	256K	OpenAI-style	See provider page

View GitHub Models setup guide →

Compare

AI21 Jamba 1.5 Large alternatives to consider

Open comparison

Model	Provider	Context	Access
Phi-4	GitHub Models	131K	Free tier
Mistral Large (24.11)	GitHub Models	131K	Free tier
gpt-5	GitHub Models	200K	Free tier
gpt-4.1	GitHub Models	1.0M	Free tier
gpt-4.1-mini	GitHub Models	1.0M	Free tier

Typical Use Cases

AI21 Jamba 1.5 Large use cases

Chat

AI21 Jamba 1.5 Large is tagged for chat in this catalog and works with OpenAI-compatible client libraries.

FAQ

AI21 Jamba 1.5 Large free API FAQ

Is AI21 Jamba 1.5 Large free to use?

AI21 Jamba 1.5 Large is listed with free API access on GitHub Models, subject to the provider's quota and account policy.

What is the AI21 Jamba 1.5 Large model ID?

The model ID shown in this catalog is AI21-Jamba-1.5-Large.

What context window does AI21 Jamba 1.5 Large support?

The listed context window is 256K tokens with up to 4K output tokens.

More about AI21 Jamba 1.5 Large