AssemblyAI vs OpenAI: Pricing Comparison 2026
Side-by-side pricing comparison of AssemblyAI and OpenAI. See all plans, features, and costs at a glance.
Bottom line: AssemblyAI starts at Custom pricing and OpenAI starts at $0.2/mo. Compare all 16 pricing tiers side by side.
Last updated: March 16, 2026
AssemblyAI vs OpenAI: Quick Pricing Facts
| Feature | AssemblyAI | OpenAI |
|---|---|---|
| Starting Price | Custom pricing | $0.2/mo |
| Number of Plans | 2 | 14 |
| Free Tier | Yes | No |
| Pricing Model | usage-based | usage-based |
| Annual Discount | N/A | N/A |
AssemblyAI and OpenAI are both priced at Custom pricing, making them equally accessible AI & ML tools. Together they offer 16 pricing plans with 0 features compared, so the best choice comes down to which features match your needs.
AssemblyAI stands out with a free plan for getting started.
Review the detailed tier-by-tier comparison above to see exactly which features are included at each price point and find the best fit for your AI & ML needs.
| Pricing Plans |  AssemblyAI Try it free |  OpenAI Try it free |
|---|---|---|
| Tier 1 | Free $0/monthCheapest | GPT-5.4 $3/month |
| Tier 2 | Pay as you go Custom pricing | GPT-5 mini $0/monthCheapest |
| Tier 3 | — | GPT-4.1 $3/monthCheapest |
| Tier 4 | — | GPT-4.1 mini $1/monthCheapest |
| Tier 5 | — | GPT-4.1 nano $0/monthCheapest |
| Tier 6 | — | o4-mini $4/monthCheapest |
| Tier 7 | — | Realtime API $2/monthCheapest |
| Tier 8 | — | Sora Video API Custom pricing |
| Tier 9 | — | Image Generation API $2/monthCheapest |
| Tier 10 | — | Responses API Custom pricing |
| Tier 11 | — | Chat Completions API Custom pricing |
| Tier 12 | — | Assistants API Custom pricing |
| Tier 13 | — | Built-in tools Custom pricing |
| Tier 14 | — | AgentKit Custom pricing |
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What Reviewers Say
AssemblyAI
AssemblyAI offers a free plan.
Based on pricing data only. Review the full comparison below for your specific needs.
Best value: AssemblyAI
Try AssemblyAI freeWhich Should You Choose?
Choose AssemblyAI if:
- •You need a free plan with core features—AssemblyAI offers no-cost access with no credit card required
- •You prioritize AssemblyAI's user experience and interface over price (both tools are similarly priced)
- •AssemblyAI's usage-based pricing lets you match exact team size without tier gaps
Choose OpenAI if:
- •You need 14 pricing tiers for flexible team sizing—more options mean less overpaying for features you don't need
- •You prioritize OpenAI's user experience and interface over price (both tools are similarly priced)
- •You want OpenAI's approach to incremental feature unlocking across its 14 pricing tiers
AssemblyAI offers a free plan [1], eliminating the cost barrier for evaluation, while OpenAI requires paid subscription from the start. This gives AssemblyAI a significant advantage for teams with budget constraints or extended trial periods. Once you outgrow AssemblyAI's free tier, upgrading to a paid plan at approximately Custom pricing provides substantial additional functionality. Compare this pricing path against OpenAI's tiering starting at $0.2/mo to assess total cost of ownership over 12 months. AssemblyAI's 2 tiers provide flexibility at different budgets, while OpenAI's 14 tiers structure may force you into higher-cost plans than necessary for your use case. If evaluation cost matters to your decision, AssemblyAI is the obvious starting point with zero financial commitment. Use the free tier to validate core functionality before committing to paid plans from either tool.
Frequently Asked Questions: AssemblyAI vs OpenAI
How many pricing plans does AssemblyAI have vs OpenAI?
Does AssemblyAI or OpenAI offer a free plan?
Does AssemblyAI or OpenAI offer custom enterprise pricing?
How do AssemblyAI and OpenAI compare for AI & ML?
Sources
- AssemblyAI Official Pricing— Vendor pricing page
- OpenAI Official Pricing— Vendor pricing page
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