OpenAI vs Spline
Which Developer Tools AI tool is better in 2026?
OpenAI
Creator of ChatGPT, GPT-4, and the leading frontier AI lab.
Spline
Design and collaborate in 3D directly in your browser with real-time capabilities.
Side-by-side
OpenAI is the more established option (raised $193.3B), but Spline is cheaper to start.
| Metric | OpenAI | Spline |
|---|---|---|
| Taglinei | Creator of ChatGPT, GPT-4, and the leading frontier AI lab. | Design and collaborate in 3D directly in your browser with real-time capabilities. |
| Foundedi | 2015🏆 | — |
| HQi | San Francisco, US | — |
| Employeesi | 1001-5000🏆 | — |
| Neuron scorei | 84🏆 | 18 |
| Total fundingi | $193.3B🏆 | Undisclosed |
| Latest roundi | Series E · Mar 2026 | — |
| Valuationi | $852B🏆 | — |
| Cheapest paid plani | ChatGPT Plus · $20/mo | From $7/mo🏆 |
| Free plani | ✓ Free | ✗ |
| Free triali | ✗ | ✗ |
| Top tier pricei | ChatGPT Team · $25/mo | Pricing not disclosed |
| Pricing summaryi | 4 published plans | Freemium · From $7/mo |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for OpenAI and Spline.
| Capability | OpenAI | Spline |
|---|---|---|
| MCP support | ✓ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✓ | ✗ |
| OAuth 2.0 | ✓ | ✗ |
| SDK languages | 6 (Python, Node.js, TypeScript, Go…) | — |
| Free plan | ✓ | ✗ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✓ | ✗ |
🟢 Strengths of OpenAI
- Has raised more capital ($193.3B vs Undisclosed)
- Higher Neuron score (84 vs 18)
- Offers a free plan
- Newer company (2015)
🔵 Strengths of Spline
- Lower starting price ($7/mo)
Which should you choose?
Choose Spline if price matters most — it starts at Freemium · From $7/mo, which is friendlier for teams watching burn. Both AI Developer Tools tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose OpenAI if you want the most established option — it has raised $193.3B, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
💸 Deals
Free daily tokens via OpenAI data-sharing tier
Eligible OpenAI API tiers can earn free daily tokens on GPT-4.1, GPT-4o, and other models by opting in to share prompts and completions for model improvement.
Terms: Opt-in required. Token allotment varies by tier.
Frequently asked questions
OpenAI vs Spline — which is better?
It depends on your priority. OpenAI has raised more capital and is the more established option; Spline is cheaper to start. See the side-by-side table above.
Is OpenAI cheaper than Spline?
No — Spline's cheapest paid plan is Freemium · From $7/mo, while OpenAI's is ChatGPT Plus · $20/mo.
Do OpenAI and Spline offer free plans?
OpenAI: Yes, has a free plan. Spline: Paid only.
Explore more AI Developer Tools tools
Contextual paths to related AI startups, deals and rankings.