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 $0.017/mo. Compare all 11 pricing tiers side by side.
Last updated: June 15, 2026
AssemblyAI vs OpenAI: Quick Pricing Facts
| Feature | AssemblyAI | OpenAI |
|---|---|---|
| Starting Price | Custom pricing | $0.017/mo |
| Number of Plans | 2 | 9 |
| 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 11 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 free |  OpenAI Try free |
|---|---|---|
| Tier 1 | Free $0/monthCheapest | GPT-5.5 Custom pricing |
| Tier 2 | Pay as you go Custom pricing | GPT-5.4 Custom pricing |
| Tier 3 | - | GPT-5.4 mini Custom pricing |
| Tier 4 | - | GPT-Realtime-2 $32/monthCheapest |
| Tier 5 | - | GPT-Realtime-Translate $0/monthCheapest |
| Tier 6 | - | GPT-Realtime-Whisper $0/monthCheapest |
| Tier 7 | - | GPT-Image-2 $8/monthCheapest |
| Tier 8 | - | Web search Custom pricing |
| Tier 9 | - | Containers $1/monthCheapest |
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What Reviewers Say
Which Should You Choose?
Choose AssemblyAI if:
- •Your application specifically needs specialized audio intelligence with speaker diarization and audio-specific features
- •AssemblyAI's audio-focused models offer more audio intelligence features than Whisper alone
- •A dedicated audio API with per-minute billing fits your cost model better
Choose OpenAI if:
- •You want one API provider for transcription (Whisper), text generation (GPT-4o), and embeddings
- •OpenAI's ecosystem - Whisper, GPT, embeddings, assistants - covers your full application stack
- •Unified billing and a single API relationship simplify your infrastructure
AssemblyAI is a specialized audio AI API. OpenAI offers Whisper for transcription alongside its broader model portfolio. AssemblyAI's audio intelligence features - topic detection, auto chapters, sentiment analysis - go beyond what Whisper provides. OpenAI's advantage is ecosystem breadth: one API key for transcription, generation, embeddings, and fine-tuning. AssemblyAI's Whisper-based competitor starts at $0.37/hour; OpenAI Whisper is $0.006/minute. For pure transcription, OpenAI Whisper is cheaper. For audio intelligence features, AssemblyAI offers more depth.
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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