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Observed 2026-06-03 11:12. Prices are USD per 1M tokens (from OpenRouter public pricing). Input: GPT-5.5 Pro $30 / GPT-4o $2.5, output: $180 / $10.
✓ = the mechanically better side per row (cheaper price / longer context). Magnitude only, not a rating.
| Field | GPT-5.5 Pro openai/gpt-5.5-pro | GPT-4o openai/gpt-4o |
|---|---|---|
| Input priceUSD/1M | $30 | $2.5✓ |
| Output priceUSD/1M | $180 | $10✓ |
| Cache readUSD/1M | Accumulating… | Accumulating… |
| Context windowtokens | 1,050k✓ | 128k |
Source: OpenRouter /api/v1/models → collect_prices.py → Source(price)。 · GPT-5.5 Pro: openai/gpt-5.5-pro · GPT-4o: openai/gpt-4o
Aggregated observations, not predictions. Prices change (observation time noted). © TraceBottle for AI
As observed on 2026-06-03 11:12, input is GPT-5.5 Pro $30 / GPT-4o $2.5 per 1M tokens — GPT-4o is cheaper. Output is $180 / $10 — GPT-4o is cheaper.
GPT-5.5 Pro: 1,050,000 tokens, GPT-4o: 128,000 tokens (observed 2026-06-03 11:12).
Observed 2026-06-03 11:12 (UTC). Source: OpenRouter public pricing (/api/v1/models). Prices change — check each provider's official pricing for the latest. This site publishes only observed values, never predictions.