Compare

GPT-4o Transcribe vs AssemblyAI Universal-3 Pro

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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GPT-4o Transcribe
openai/gpt-4o-transcribe
AssemblyAI Universal-3 Pro
assemblyai/universal-3-pro
Provider
OpenAI
AssemblyAI
Family
GPT-4
Universal
Modality
audio-stt
audio-stt
Context window
Max output
Released
2026-05-22
2026-05-22
License
Proprietary
Proprietary
Per minute
$0.0060 /min
$0.0035 /min
Tools
Streaming
Vision
JSON mode
Reasoning
Prompt caching
Batch API
Try it
View model →
View model →
GPT-4o Transcribe
openai/gpt-4o-transcribe
Full spec →

A speech-to-text model that uses GPT-4o to transcribe audio with improved word error rate and better language recognition compared to original Whisper models.

Strengths
  • Speech-to-text transcription
Use cases
Meeting transcriptsCaptionsVoice agents
AssemblyAI Universal-3 Pro
assemblyai/universal-3-pro
Full spec →

AssemblyAI's Universal 3 Pro speech recognition model for high-accuracy transcription.

Strengths
  • Speech-to-text transcription
Use cases
Meeting transcriptsCaptionsVoice agents

Compare with another

GPT-4.1 vs GPT-4o Transcribe
openai/gpt-4.1 · openai/gpt-4o-transcribe
GPT-4.1 Mini vs GPT-4o Transcribe
openai/gpt-4.1-mini · openai/gpt-4o-transcribe
GPT-4.1 Nano vs GPT-4o Transcribe
openai/gpt-4.1-nano · openai/gpt-4o-transcribe
GPT-4o vs GPT-4o Transcribe
openai/gpt-4o · openai/gpt-4o-transcribe
GPT-4o Mini vs GPT-4o Transcribe
openai/gpt-4o-mini · openai/gpt-4o-transcribe
SWITCH BETWEEN THEM

One key, all 2, one line different.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.aigateway.sh/v1",
    api_key="sk-aig-...",
)

# GPT-4o Transcribe
client.chat.completions.create(
    model="openai/gpt-4o-transcribe",
    messages=[{"role":"user","content":"hello"}],
)

# AssemblyAI Universal-3 Pro
client.chat.completions.create(
    model="assemblyai/universal-3-pro",
    messages=[{"role":"user","content":"hello"}],
)
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