TL;DR — GPT-5.4 and GPT-4o share the same input price ($2.50) — the entire difference is output: $15 vs $10 per 1M. Every number below is from our weekly-verified pricing tracker (verified 2026-08-26).
Pricing side by side (per 1M tokens, USD)
| Model | Provider | Input | Output | |-------|----------|-------|--------| | GPT-5.4 | OpenAI | $2.5 | $15 | | GPT-4o | OpenAI | $2.5 | $10 |
Verified 2026-08-26 against official rate cards — the tracker keeps the change log.
What a real month costs
At a standard workload of 10M input + 2M output tokens/month:
- GPT-5.4: $55.00
- GPT-4o: $45.00
On this mix, GPT-4o is the cheaper column (1.2× gap). Your ratio will differ — run your own mix through the LLM cost calculator.
Choose GPT-5.4 if
reasoning depth is the point: the newer tier earns its 50% output premium on multi-step tasks where answer quality compounds.
Choose GPT-4o if
your workload is output-heavy generation — drafting, chat, multimodal — where 33% cheaper output tokens dominate the bill and GPT-4o's quality is already sufficient.
Routing decision card
- With identical input rates, your input:output ratio decides everything — output-heavy workloads tilt to GPT-4o, reasoning workloads to GPT-5.4
- Run both against your real prompt mix in the calculator before committing
- A router can split by task type and capture both sides' advantage automatically
- The router answer: most teams shouldn't hard-pick one — ClawRouters routes each request to whichever side fits it, so the comparison becomes a per-call decision instead of a bet.
Part of the LLM model comparison index. Prices move fast in 2026 — the tracker logs every change with dates.