Compare ยท Saidwire vs OpenAI
Saidwire vs OpenAI for voice agents
On Coval's public benchmark, Wire-1 by Saidwire returns the final transcript 35 ms on average after the end of speech (Coval, last measured Nov 10, 2026), and OpenAI's quickest listed model, GPT Realtime Whisper, takes 557 ms (Coval, last measured Nov 10, 2026). On error rate the two are close: Wire-1 measures 3.7% and GPT Realtime Whisper measures 4.0% (Coval, last measured Nov 10, 2026). Choose OpenAI if you want one vendor for the language model and transcription, or you need languages other than English; choose Saidwire if the wait before your agent can answer matters most and your callers speak English.
Speed and accuracy
Every OpenAI speech-to-text model Coval lists, next to Wire-1. Lower is better in both columns.
| Model | Mean time to final segment | Word error rate | Source and date |
|---|---|---|---|
| Wire-1 (Saidwire) | 35 ms | 3.7% | Coval, last measured Nov 10, 2026 |
| GPT Realtime Whisper (OpenAI) | 557 ms | 4.0% | Coval, last measured Nov 10, 2026 |
Listed price
| List price | Source and date | |
|---|---|---|
| Saidwire Wire-1 | $0.25 per audio hour, billed per second; $0.15 for voice platforms and founding customers; 120 free hours, no card | Saidwire pricing |
| OpenAI | We could not find a list price under this model name on the vendor's pricing page, so none is quoted here. | OpenAI pricing page |
Where OpenAI is the better choice
- One account: if you already use OpenAI for the language model, adding transcription needs no new vendor.
- Saidwire also accepts the OpenAI SDK for file transcription, so you can try both with the same client code.
Where Saidwire is the better choice
- Time to final transcript: 35 ms on average and 50 ms at the 95th percentile, 1st of 29 (Coval, last measured Nov 10, 2026). GPT Realtime Whisper from OpenAI measures 557 ms on average (Coval, last measured Nov 10, 2026).
- A long free trial: 120 audio hours with no card and no deadline, on up to 4 streams at once.
- Audio is processed in memory and never stored, and transcripts are not logged (security and data).
Switching
For files, Saidwire accepts the OpenAI SDK: change base_url to https://api.saidwire.com/v1, the key, and the model name to saidwire-en. For live audio, use the WebSocket endpoint or a plugin.
Test both on your own audio
Saidwire's file endpoint takes the OpenAI SDK, so the same few lines test both: run them once with your OpenAI settings and once with these. Get a free Saidwire key at saidwire.com/dev.
# pip install openai
import os
from openai import OpenAI
client = OpenAI(base_url="https://api.saidwire.com/v1", api_key=os.environ["SAIDWIRE_API_KEY"])
with open("call.mp3", "rb") as f:
r = client.audio.transcriptions.create(model="saidwire-en", file=f)
print(r.text)Test OpenAI with your own OpenAI account and its SDK, under its terms. We do not run or publish tests of other vendors.
How to read these numbers
- Who measured. Speed and error-rate figures are Coval's, from its public benchmark pages. Coval runs every model daily on the same audio and starts every timer from one shared end-of-speech point. Saidwire ran none of these tests and does not test other vendors.
- Time to final segment is the wait between the end of speech and the final transcript: the wait a voice agent has before it can answer. It leaves out your network round trip and each vendor's own turn-detection delay.
- Word error rate is the share of words a transcript gets wrong on Coval's test audio. Your audio will differ.
- Prices are list prices read from each vendor's public pricing page on Nov 10, 2026. Plans, discounts and add-ons change them; the vendor's page is the authority.
- What Coval leaves out. Coval does not score every model, language, add-on or setting a vendor offers, and it says so on each provider page. Features such as speaker labels, translation and language coverage are not part of these two numbers.
- Figures roll daily. Each row links to the page it came from, with that page's date.
Questions
Which returns the final transcript sooner, Saidwire or OpenAI?
On Coval's public benchmark, Saidwire: Wire-1 measures 35 ms mean time to final segment (Coval, last measured Nov 10, 2026) and OpenAI's GPT Realtime Whisper measures 557 ms (Coval, last measured Nov 10, 2026).
Which is more accurate, Saidwire or OpenAI?
On Coval's public benchmark, Wire-1 (3.7%; GPT Realtime Whisper measures 4.0%). Sources: Coval, last measured Nov 10, 2026 for OpenAI; Coval, last measured Nov 10, 2026 for Saidwire.
How do the prices compare?
Saidwire lists $0.25 per audio hour. We could not find a list price for GPT Realtime Whisper on OpenAI's pricing page on Nov 10, 2026, so check that page directly.
When should I pick OpenAI instead?
When you want one vendor for the language model and transcription, or you need languages other than English.
Questions or stuck? Email support@saidwire.com. Saidwire LLC, 215 W Pershing Rd Ste 403 PMB 1093, Kansas City MO 64108.
OpenAI and the other names on this page belong to their respective owners. They are named only to describe compatibility or to compare public figures; no partnership or endorsement is implied. Coval benchmark figures are from Coval's public pages; Coval does not endorse Saidwire.