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OpenAI Codex for Open Source

LLM 9.7/10

Reported free ChatGPT Pro and Codex credits for maintainers of public open-source projects, applied via an official OpenAI form.

Free credit
$1,200
Credit window
180 days
Card required
No

OpenAI Codex for Open Source scores 9.7/10 for free value in LLM. The main constraint: Reported: free ChatGPT Pro / Codex credits for roughly 6 months — verify current terms, duration, and eligibility on the official form.

Category LLM Kind Open-source grant Caveats Approval is not guaranteed and you must describe a genuine project; the reported ~6-month duration and any credit amounts are approximate, may change, and should be verified on the official OpenAI form before relying on them. Card required No Eligibility open source projects, approval required

Free value score

9.7 / 10
Show the math
Value 10/10
value = 1200 $ one-time
weighted score = 0.7 * 10/10
Model Quality 9.8/10
value = 55 artificial_analysis_score
weighted score = 0.2 * 9.8/10
Volume 7.1/10
value = 106666667 tok/mo
weighted score = 0.1 * 7.1/10
Access 4/10
value = 4/10
score = 4/10

Key metrics

gpt-5.5 55 Best model
$1,200 Credit
No Commercial use OSS maintainer workflows only

Models

6 free · 6 total

Limits may be stale — last re-verified outside this section's freshness window.

Model Family AA Access
gpt-5.5 GPT 54.8 free
gpt-5.4 GPT 51.4 free
gpt-5.3-codex GPT 44.3 free
gpt-5.3-codex-spark GPT 44.3 free
gpt-5.2 GPT 42.2 free
gpt-5.4-mini GPT 40 free

Compare all free models across providers →

What you get

Reported free ChatGPT Pro / Codex credits

For maintainers of public OSS projects

Applied via official OpenAI form

Approval not guaranteed; verify current limits

Gotchas

  • 6-month access window

    ChatGPT Pro with Codex is granted for six months only; access does not automatically renew after the period ends.

  • OSS core maintainer gate

    Applicant must be a core maintainer with write access to a widely-used public open-source project; hobbyist or placeholder projects are not eligible.

  • Manual application and approval

    Access is not self-serve — applicants submit an OpenAI form and approval is not guaranteed; OpenAI reviews each case individually.

  • API credits finite pool

    API credits come from the Codex Open Source Fund ($1 M pool); amounts are unspecified per applicant and will not regenerate once the fund is exhausted.

  • OSS project use only

    Benefits are granted specifically for open-source maintainer workflows (PR review, automation, releases); commercial or personal projects are outside the program scope.

Sources

credits open-source openai
Open service Source ← All LLM

Alternatives

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VC-backed AI startups can get up to $350,000 in Google Cloud credits over 2 years, covering Gemini and Gemma models in Vertex AI.

$350,000 one-time*50.2 AA103.7B tok
Checked 10d ago
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AWS Activate CreditsAWS Activate Credits · startup · Startup cloud + LLM credits
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Eligible startups can get $1,000 up to $200,000 in AWS Activate credits, usable on Amazon Bedrock foundation models (incl. Claude) and Kiro.

$200,000 one-time*53.5 AA20.0B tok
Checked 10d ago
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OpenAI Codex Enterprise Credit PromoOpenAI Codex Enterprise Credit Promo · finite_credit · API credit promo
9.4

Official OpenAI promo reportedly offering API credits for qualifying Codex use cases via an application form.

$1,000 one-time*44.3 AA207.8M tok
May be outdatedChecked 28d ago
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