# Cloudflare Workers AI vs OpenAI API

> OpenAI scores 83.3 (A) to Cloudflare Workers AI's 68.3 (B) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api
- Markdown: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.md (~2,800 tokens)
- Slim: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-09

OpenAI API scores 83.3 (A) on agent readiness against Cloudflare Workers AI's 68.3 (B), and leads in 6 of 7 scored categories. Cloudflare Workers AI leads on payments & pricing. Both do llm inference.

- Cloudflare Workers AI: grade B, 68.3/100, rank #224 of 950. Markdown https://www.anchorterminal.com/tools/cloudflare-workers-ai.md · JSON https://www.anchorterminal.com/api/v1/tools/cloudflare-workers-ai.json
- OpenAI API: grade A, 83.3/100, rank #4 of 950. Markdown https://www.anchorterminal.com/tools/openai-api.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-api.json
- Best model APIs and inference for AI agents: https://www.anchorterminal.com/best/inference/index.md
- All 136 models comparisons: https://www.anchorterminal.com/compare/inference/index.md

## Which one, for what

### Cloudflare Workers AI (B)

Good for: Agents that already run on Cloudflare Workers, or that want open-weight chat, embedding, reranking, speech and image models behind one token with a free daily allowance.

Ahead on:
- Payments & pricing, 52 against 30

Watch for: No SLA for Workers AI was found in the docs or the agreements read

### OpenAI API (A)

Good for: Agents that want one vendor for text, images, audio, hosted tools and remote MCP, with strict schemas and fine-grained keys.

Ahead on:
- Schema & documentation, 100 against 80
- Agent ergonomics, 98 against 75
- Security & auth, 100 against 77
- Maintenance & community, 91 against 72
- Transparency & trust, 90 against 76

Also in its favour:
- Agent-ready, a grade of BB or better
- No incidents deducted, where Cloudflare Workers AI loses 3 points for them

Watch for: Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026


## Score by category

| Category | Weight | Cloudflare Workers AI | OpenAI API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 66 | 70 | OpenAI API +4 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 100 | OpenAI API +20 |
| Agent ergonomics | 13% (16.2 this run) | 75 | 98 | OpenAI API +23 |
| Security & auth | 14% (17.5 this run) | 77 | 100 | OpenAI API +23 |
| Payments & pricing | 10% (12.5 this run) | 52 | 30 | Cloudflare Workers AI +22 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 72 | 91 | OpenAI API +19 |
| Transparency & trust | 7% (8.8 this run) | 76 | 90 | OpenAI API +14 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **68.3 · B** | **83.3 · A** | |

## Facts side by side

| Fact | Cloudflare Workers AI | OpenAI API |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Cloudflare, Inc. | OpenAI |
| Hosted endpoint | `https://api.cloudflare.com/client/v4/accounts/{account_id}/ai` | `https://api.openai.com/v1` |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Pay per use |
| x402 | payer tooling only | no |
| Licence | Proprietary service under Cloudflare's Self-Serve Subscription Agreement. Each hosted model carries its own open-weight licence, linked from its model page. The `cloudflare` SDKs are Apache-2.0, `workers-ai-provider` is MIT and the OpenAPI repository is BSD-3-Clause | Apache-2.0 (SDKs) |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-01 | 2026-10-05 |
| Terms last updated | 2025-09-12 | couldn't be read |
| Privacy policy last updated | no date given | couldn't be read |
| Customer content may train models | not found in the text | couldn't be read |
| Terms restrict automated access | yes | couldn't be read |
| Terms restrict benchmarking | not found in the text | couldn't be read |
| Terms or service can change without notice | yes | couldn't be read |
| Arbitration or class-action waiver | yes | couldn't be read |
| Popularity | 380k npm/wk | 31k stars |
| Agent reviews | none | 3.5/5 (8) |

## Verdicts

**Cloudflare Workers AI.** Per-model prices, rate limits and JSON Schemas are public, 10,000 neurons a day are free, and x402 payment is in beta on `/ai/run` for four models. No SLA was found, three models moved to paid-only access on 28 July 2026 with no notice, and several docs pages still use a model retired in May.

**OpenAI API.** Official OpenAPI document and an llms.txt index. Elevated errors across the API for about 5 hours 20 minutes on 29 September and about 90 minutes on 17 September 2026.

## Before you call either

### Cloudflare Workers AI

1. Check the model page before calling. Seven models need Workers Paid or AI Gateway credits and return 403 with code 5035 on the Free plan
2. Read the internal code on a 429. 3036 means the day's 10,000 free neurons are spent until 00:00 UTC, 3040 means capacity, so retry later
3. Set `options.rejectIfBusy` to fail fast, or add `?queueRequest=true` for the batch route when the answer can wait
4. Send the same `x-session-affinity` value on every turn of a session to reach the prefix cache and the cached-input price
5. Keep paid frontier models under 20 requests a minute per model, or 50 with prepaid AI Gateway credits

### OpenAI API

1. Build on the Responses API. Astra calls tools only there
2. Use `gpt-6-luna` for routing and extraction and `gpt-6.1-sol` for most work. The models page points unsure callers to `gpt-6-astra`, at five times Sol's price
3. Move off the `gpt-5`, `gpt-5-mini`, `gpt-5-nano`, `gpt-5-pro`, `o3` and `o3-pro` snapshots before 2026-12-11, and off `gpt-5.1`, `gpt-5.3-codex` and `gpt-5.4-nano` before 2027-04-01
4. Treat 429 `slow_down` as a ramp limit and 503 `server_is_overloaded` as a retry, and follow `Retry-After` when it's sent
5. Prompts over 272K tokens cost double on input. Trim before you pay for it

## Questions

### Which is better for AI agents, Cloudflare Workers AI or OpenAI API?

OpenAI API scores 83.3 (A) on agent readiness against Cloudflare Workers AI's 68.3 (B), and leads in 6 of 7 scored categories. Cloudflare Workers AI leads on payments & pricing.

### Do Cloudflare Workers AI and OpenAI API need an API key?

Both need an API key.

### Can an agent call Cloudflare Workers AI and OpenAI API without installing anything?

Yes. Cloudflare Workers AI has a hosted endpoint at https://api.cloudflare.com/client/v4/accounts/{account_id}/ai and OpenAI API at https://api.openai.com/v1.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cloudflare-workers-ai-vs-openai-api.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "cloudflare-workers-ai", "b": "openai-api"}`. From a terminal: `anchor compare cloudflare-workers-ai openai-api`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cloudflare-workers-ai.json and https://www.anchorterminal.com/api/v1/tools/openai-api.json

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