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GPT-5.4 vs Gemini 3 Pro: API Pricing Compared — Which Should You Route To? (2026)

2026-08-28·2 min read·ClawRouters Team
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TL;DR — Gemini 3 Pro is roughly half GPT-5.4's input and a third its output ($1.25/$5 vs $2.50/$15). 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 | | Gemini 3 Pro | Google | $1.25 | $5 |

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:

On this mix, Gemini 3 Pro is the cheaper column (2.4× gap). Your ratio will differ — run your own mix through the LLM cost calculator.

Choose GPT-5.4 if

OpenAI ecosystem fit or task-specific quality on your evals — at 2–3× the price, GPT-5.4 must earn the premium per task, not by reputation.

Choose Gemini 3 Pro if

cost-efficient frontier reasoning: Gemini 3 Pro's rates changed what 'mid-tier price' means in 2026, and for many workloads it clears the same bar.

Routing decision card

Part of the LLM model comparison index. Prices move fast in 2026 — the tracker logs every change with dates.

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