OpenLuxCursor API cost with a custom OpenAI-compatible endpoint
When Cursor uses a custom endpoint, model usage is billed by that endpoint rather than inferred from a Cursor plan alone. The exact cost depends on which Cursor requests use the custom key and the context they send. Model that traffic explicitly, then verify feature support against current Cursor documentation.
Reviewed by OpenLux Engineering Team · Last verified
What can change Cursor custom-endpoint cost?
Separate the Cursor subscription from usage sent to your chosen API endpoint.
| Factor | Question to answer | Cost implication |
|---|---|---|
| Feature support | Which chat or agent requests accept the custom provider? | Only routed requests appear on the endpoint bill |
| Context | How much code, history and attached file content is sent? | Larger prompts increase input tokens |
| Model | Which catalogue model handles chat, edits or review? | Different rates and quality |
| Retry behaviour | Does the workflow repeat failed calls? | Additional metered usage |
| Team size | How many developers share the configured endpoint? | Budget must scale with active users |
| Plan boundary | What remains covered by Cursor itself? | Do not assume the endpoint bill replaces the Cursor plan |
Does a custom API endpoint replace Cursor pricing?
Not necessarily. Cursor may apply its own plan and feature limits while routed model requests are billed by the custom provider. Keep the Cursor subscription and API usage as separate lines in the budget.
Check the current Cursor documentation for the exact features that support a custom OpenAI-compatible provider before claiming that all Cursor usage is pay-as-you-go.
How do you estimate custom-endpoint usage?
Count the requests that actually route through the endpoint, then estimate input and output tokens for representative chat and coding tasks. Add retries and multiply by active developers and working days.
The calculator is a planning model, not a statement about every Cursor feature. Use endpoint logs to identify which features produced the traffic.
Which model should Cursor use for routine work?
Choose a lower-cost model for concise Q&A, small edits and code explanation, then test whether it meets the team's quality bar. Reserve stronger models for complex debugging and cross-file changes.
Keep a stable model mapping so a Cursor update does not silently route ordinary work to an expensive tier.
How should finance reconcile Cursor and API bills?
Record the Cursor subscription separately from OpenLux usage. Tag endpoint keys by team or project and reconcile the metered request cost with the console invoice.
If a feature stays inside Cursor and does not call the custom endpoint, do not attribute that traffic to OpenLux.
Which option fits?
Use a custom endpoint when
- The required Cursor features support your compatible provider.
- You need one model gateway and bill across editors.
- The team can monitor routed request usage.
Keep the default Cursor path when
- A required feature does not support the custom key.
- The endpoint setup adds more support risk than the bill saves.
- You cannot separate Cursor plan and API usage in finance.
Estimate your coding-agent API cost
Adjust the workload to match one developer, then scale by team size. The calculation uses the current OpenLux catalogue rate and a blended token assumption.
Assumptions: one blended per-million-token rate, all input and output tokens counted once, and failed attempts equal to the retry percentage. Your console invoice is authoritative. Compare OpenLux plans.
Same assumptions across text models
These rows apply the same token, session and retry assumptions to each published model rate.
| Model | Monthly per developer | Monthly team cost |
|---|---|---|
| gpt-6-astra | $1.78 | $1.78 |
| gpt-5.6-sol | $0.8915 | $0.8915 |
| gemini-3.8-flash | $0.2673 | $0.2673 |
| gemini-3-flash-preview | $0.1785 | $0.1785 |
| claude-sonnet-4-5-20250929 | $1.28 | $1.28 |
| claude-opus-5 | $2.14 | $2.14 |
| claude-fable-5-1 | $8.56 | $8.56 |
| gemini-3.1-pro-preview | $0.7135 | $0.7135 |
| deepseek-v4 | $0.2973 | $0.2973 |
| qwen3-max | $0.3803 | $0.3803 |
Related models and live rates
| Model | Vendor | Price | Vs. official |
|---|---|---|---|
| gpt-5.6-sol | OpenAI | $0.1838 / 1M tokens | -96% |
| claude-sonnet-4-5-20250929 | Anthropic | $0.2647 / 1M tokens | -91% |
| gemini-3.8-flash | $0.0551 / 1M tokens | -92% | |
| deepseek-v4 | DeepSeek | $0.0613 / 1M tokens | -90% |
Key takeaways
- Cursor plan pricing and custom-endpoint API usage are separate budget lines.
- Only verify and count traffic that actually routes through the custom endpoint.
- Use current Cursor documentation for feature-specific compatibility.
Frequently asked questions
Does Cursor charge the same as the API provider?
They are separate products. Review the Cursor plan and the custom endpoint usage independently.
Can every Cursor feature use a custom OpenAI-compatible endpoint?
Support depends on the current Cursor plan and feature. Check official documentation before assuming complete coverage.
How can a team estimate Cursor API spend?
Model only routed requests, using representative input/output tokens, retries and active developers from endpoint logs.
How do I stop Cursor from making an expensive model the default?
Use an explicit model mapping where supported and review endpoint logs for unexpected model names or task types.
Sources and methodology
Competitor claims were checked against the linked public pages on the verification date. Pricing and product terms can change; confirm them before purchase.
- Cursor documentationOfficial model and API configuration documentation.
- OpenLux model catalogue and current ratesRates were read from the live catalogue on 2026-10-31.
- OpenLux Cursor integrationCustom base URL setup guide.
Model the Cursor workload separately
Count only the requests routed to your endpoint and keep the Cursor plan as its own line item.