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OpenAI Realtime API vs ServiceAgent
OpenAI Realtime API is positioned as speech-to-speech API for developers implementing their own voice application. ServiceAgent is positioned as a home-service front-office product combining call handling with business administrat
OpenAI Realtime API is positioned as speech-to-speech API for developers implementing their own voice application. ServiceAgent is positioned as a home-service front-office product combining call handling with business administration. Start by deciding who owns the missing layers, then inspect the documented differences below.
Developer Frameworks and Full Platforms are different product categories. An underlying engine or framework is not a complete substitute for a deployed agent workflow.
5 jointly documented catalog fields. This measures evidence coverage, not equivalent quality or an overall winner.
Test opening hours, booking conflicts and an unanswered transfer.
Start where the records differ.
Values and evidence states are compared together. Shared facts follow the differences; Unknown never means No.
| Decision point | OpenAI Realtime API | ServiceAgent |
|---|---|---|
| Billing modelDifferent records | component-stack | character-credit |
| Billing unitDifferent records | 1 million text/audio/image tokens; transcription separately metered | Action credits;15credits/AI voice minute,2/SMS segment,5/ad creative,1/review reply |
| Bring your telephonyDifferent records | Yes | Unknown |
| Warm transferDifferent records | Unknown | Yes |
| WebhooksDifferent records | YesUnknown | YesAPI / webhook |
| Bring your modelShared state | Unknown | Unknown |
Your requirements & next steps
Your requirements
Ready-made / AI receptionist · Strict evidence mode
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Realtime model tokens plus input transcription, tools and carrier/hosting; not GPT-Live session-minute billing.
Monthly bundle plus action/telecom credits;15credits/AI voice minute. Not a single all-in minute price.
Cached audio/text and image inputs have separate rates. Rate is not per-minute.
Growth119monthly/95annual-equivalent;Franchise349/279. Display separates monthly and annual commitment.
Model scope fixed to GPT-Realtime-2, not all voice models.
Top-up credit price is$0.02–$0.04; platform fees, included credits and other actions must be modeled separately.
Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.
Annual equivalents39/95/279requireyearlybilling;location/ad/paymentfees separate.
Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.
Different activities draw from credits; do not convert the entire allowance to guaranteed calling minutes.
Published Realtime token rates do not establish these account/contract terms. GPT-Live duration billing and unrelated fine-tuning discounts must not be imported.
AI voice15credits/minute; top-up package and selected plan determine cost.
Repeated context, cache behavior and turn count affect token charges.
Reviewed current public offer; retain original billing scope and units.
Not yet researched against this buyer-critical field standard.
Reviewed current public offer; retain original billing scope and units.
Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient.
Variable credit purchase tiers, nonvoice consumption, fees and current waitlist prevent a guaranteed all-in voice rate.
Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient.
Research conclusion about cost completeness, not a vendor capability.
Anyone with this link can view the encoded decision criteria.
Vendor documentation establishes a claim. Public model benchmarks are separate context, not measurements of these platforms.
Open saved comparison ↗What to verify together.
OpenAI Realtime API
A token rate cannot be compared directly with a bundled call-minute price.
GPT-Realtime-2 audio input $32/M, audio output $64/M; text input $4/M, output $24/M · V3.3 evidence review · GPT-Realtime-2 input audio tokens only; output/audio/text/cache have different rates; not 2.1 rate evidence
Excluded / confirm: Complete cost cannot be established from this reference. Full bill requires measured model/token/cache/tool/carrier usage; conversation minutes alone are insufficient. · Input transcription, tool/backend calls, carrier and application infrastructure
Realtime model tokens plus input transcription, tools and carrier/hosting; not GPT-Live session-minute billing.
ServiceAgent
The public site still carries a launch-soon banner; confirm availability before migrating calls.
Launch $0; paid Core $49/month or $39/month billed yearly · V3.3 evidence review · Core monthly subscription and action-credit allowance; current waitlist, not general availability
Excluded / confirm: Complete cost cannot be established from this reference. Variable credit purchase tiers, nonvoice consumption, fees and current waitlist prevent a guaranteed all-in voice rate. · SMS, campaigns and payment/other service fees vary
Monthly bundle plus action/telecom credits;15credits/AI voice minute. Not a single all-in minute price.
The evidence overlap.
Both records have documented values for Product type, Technical setup, Published numeric pricing, Checked within 30 days, Retained price snapshot. Matching availability does not measure behavior under your call conditions.
Run the same booking, tool failure and unsuccessful human-transfer cases. Record both outcomes and billable units before signing a deployment agreement.
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