GPT-4o
OpenAI's successor to GPT-4, with a single unified model handling text, audio, and images natively — instead of separate models stitched together. The "omni" of the name refers to this multimodal integration. Launched with a real-time voice mode designed to mimic natural conversation, complete with interruption handling and emotional tone. Made flagship-tier capability free to consumer ChatGPT users for the first time.
How are Intelligence, Speed & Cost bucketed?
- Top 1%≤ 1%
- Top 5%≤ 5%
- Top 10%≤ 10%
- Good≤ 25%
- Medium≤ 50%
- Below avg> 50%
- Top 1%≥ 345 tok/s
- Top 5%≥ 237 tok/s
- Top 10%≥ 196 tok/s
- Good≥ 146 tok/s
- Medium≥ 90 tok/s
- Slow< 90 tok/s
- Freeopen weights · self-host
- Low< $1 / M out
- Moderate$1–5 / M out
- High≥ $5 / M out
Why it matters
GPT-4o ended the era when "using the best AI" meant paying $20/mo. Once frontier capability became free with an email address, the user population expanded by an order of magnitude — reshaping regulatory scrutiny, labor-market debate, and education policy everywhere.
Core Capabilities
Context Window
Availability
Pricing Model
Capability / Performance
Where this model sits relative to the middle 60% of models in the tree. All scores are 0–10 (higher is better).
What it feels like
- First end-to-end omni model — text, vision, audio share one neural net (not stitched pipelines)
- 2x faster, half the price, and 5x higher rate limits than GPT-4 Turbo
- Native voice-to-voice latency around 320ms — close to human conversational rhythm (210ms)
- Realtime API (Oct 2024) opened up always-on voice assistants for developers
- Reasoning is solid but not o1-class — by 2025 it's the 'speed/cost tier', not the 'IQ tier'
- GPT-4o mini (Jul 2024) became the GPT-3.5 Turbo replacement at much better quality
Best use cases
- Voice-first applications and real-time multimodal interfaces
- Cost-sensitive bulk inference where GPT-4-class quality is enough
- Image understanding workflows — strong vision pipeline at API price
- Replacing GPT-3.5/Turbo deployments with 4-tier quality at similar cost
Tools to try
Not ideal for
- Hard reasoning, math, or research — o1/o3/GPT-5 are the right tier
- Frontier-leaderboard coding (Claude 3.5 Sonnet+ outscored GPT-4o on SWE-bench by mid-2024)
- Self-hosted / open-weights workflows
Model Evolution
GPT is OpenAI's audio model family.