OpenAI Codex Open Source Fund

About Codex Open Source Fund

OpenAI's $1M fund awards $25K API credits to open-source projects using Codex CLI or OpenAI models—no equity stake or sponsor required.
Credits cover inference, fine-tuning, and embeddings across GPT-4, GPT-3.5, and Codex; technical mentorship from OpenAI included.
Rolling applications; ideal for OSS maintainers bootstrapping LLM integrations without upfront spend.

The Codex Open Source Fund is OpenAI's $1 million grant initiative supporting open-source projects that build with Codex CLI or other OpenAI models. Successful applicants receive $25,000 in API credits, technical guidance from OpenAI engineers, and ecosystem support to accelerate adoption across Python, JavaScript, Shell, and other languages.

Codex Open Source Fund at a glance

The Codex Open Source Fund is OpenAI's $1 million grant initiative supporting open-source projects that build with Codex CLI or other OpenAI models. Successful applicants receive $25,000 in API credits, technical guidance from OpenAI engineers, and ecosystem support to accelerate adoption across Python, JavaScript, Shell, and other languages.

$1MTotal fund size
$25KPer-project credit grant
RollingApplication window
No equityDilution or sponsor required

The Codex Open Source Fund offer explained

Approved open-source projects receive $25,000 in OpenAI API credits usable for model inference, fine-tuning, embeddings, and other API calls. Credits are applied to your OpenAI account and consumed on a pay-as-you-go basis; there is no cash alternative. The grant is non-dilutive and does not require VC sponsorship or board seat.

Heads up: credit programs change their terms and caps regularly — confirm the current offer on the application page before you plan around it.

Apply to Codex Open Source Fund

Eligibility & key terms

Detail	What to know
Project type	Open-source (public repo, OSI-approved license or equivalent)
Integration requirement	Must use Codex CLI, GPT-4, GPT-3.5, or other OpenAI models
Credit amount	$25,000 per approved project
Application process	Direct application; rolling basis, no sponsor required
Geographic scope	Global; OpenAI API availability required

How Codex Open Source Fund compares

Here's how Codex Open Source Fund stacks up against other AI/ML platform credits in the same category:

Program	Headline offer	Category
Codex Open Source Fund	$25,000 in credits	This page
Google AI Startup Program	$350,000 in credits	AI Platform Credits
Google Cloud Gen AI $1000 Fast-Start Program	$1,000 in credits	AI Platform Credits
Google Cloud Web3 Startup Program	$200,000 in credits	AI Platform Credits

How to apply for Codex Open Source Fund

1. Verify open-source status
Confirm your project is public, has an OSI-approved license (MIT, Apache 2.0, GPL, etc.), and demonstrates active maintenance and community engagement.
2. Document OpenAI integration
Prepare a clear description of how your project uses Codex CLI or OpenAI models—include code examples, use case, and expected API consumption.
3. Submit application
Apply via OpenAI's Codex Open Source Fund portal (openai.com/blog/codex-open-source-fund or similar). Include project repo link, maintainer info, and integration roadmap.
4. Await review & activation
OpenAI reviews applications on a rolling basis. Upon approval, credits are added to your OpenAI account; start using them immediately via the API.

Pro tip: Emphasize community impact and real-world adoption in your application—projects with active users, clear documentation, and a roadmap for expanding OpenAI model usage are prioritized. Include GitHub stars, download metrics, or testimonials to strengthen your case.

Non-dilutive fuel for open-source teams: $25K in API credits, zero equity, zero gatekeeping.SaaSTweaks editorial

Who should apply — and who shouldn't

Apply if

Your open-source project actively integrates or plans to integrate Codex CLI or OpenAI models and needs compute budget to scale.
You want to avoid dilution and maintain full control of your project while accessing enterprise-grade LLM infrastructure.
You're building in Python, JavaScript, Shell, or other languages where Codex CLI tooling is mature and you can leverage OpenAI's technical support.
You have a clear roadmap for LLM adoption and can demonstrate community traction or active maintenance.

Skip if

Your project is closed-source, proprietary, or does not yet use OpenAI models—ineligible by design.
You need cash or flexible payment terms; credits are non-transferable and expire if unused within OpenAI's standard policy window.
You're building a commercial SaaS product that monetizes OpenAI API calls; the fund prioritizes non-commercial, community-driven projects.

If Codex Open Source Fund isn't the right fit, compare it against Google AI Startup Program, Google Cloud Gen AI $1000 Fast-Start Program, Google Cloud Web3 Startup Program, Google Workspace Promo Code — or browse the full AI Platform Credits category.

Final verdict

Apply — strong program.

Non-dilutive, no strings attached, and rolling applications lower the barrier to entry for eligible open-source teams. $25K in credits is meaningful for LLM experimentation and production workloads; combined with OpenAI mentorship, this is a high-value grant for projects already committed to OpenAI's ecosystem.

Apply to Codex Open Source Fund

Capabilities

• $25,000 in non-dilutive API credits
• No equity stake or board seat required
• Direct application; rolling basis
• Technical mentorship from OpenAI engineers
• Access to GPT-4, GPT-3.5, Codex, embeddings, fine-tuning
• Ecosystem support and community visibility
• Multi-language support (Python, JavaScript, Shell, etc.)
• No cash conversion; credits-only

How to claim

Click claim

Hit the button on this page — opens the partner site in a new tab.
Sign up through the partner link

No code needed — the offer applies automatically when you register through our Codex Open Source Fund link.
Offer applies automatically

No surcharge to you — verified by the SaaSTweaks Deal Desk, not the vendor.

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Frequently asked

Who's eligible?

Open-source projects (public repo, OSI-approved license) that actively use or integrate Codex CLI or OpenAI models. Project must demonstrate active maintenance and community engagement.

How long do credits last?

Credits follow OpenAI's standard expiration policy (typically 12 months from issuance). Check your OpenAI account dashboard for exact expiry date; unused credits are forfeited.

Do I need a VC sponsor or board seat?

No. This is a direct grant program. You apply independently; no sponsor, investor, or third-party endorsement required.

What happens when credits run out?

Once credits are exhausted, you revert to standard OpenAI API pricing (pay-as-you-go). You can apply for additional grants in future cycles if eligible, but there is no guarantee of renewal.

Can I combine this with other OpenAI programs or discounts?

Clarify with OpenAI directly; typically, credits and discounts do not stack. Check your account terms or contact support to confirm overlap rules.

How long does approval take?

OpenAI reviews applications on a rolling basis. Typical turnaround is 2–4 weeks, but timelines vary. You'll be notified via email once a decision is made.