Claude Sonnet 5.5 vs GPT-5.4
anthropic/claude-sonnet-5.5 · openai/gpt-5.4
As of October 31, 2026, Claude Sonnet 5.5 is the cheaper API on UberLLM: $0.7610 per million input tokens and $3.80 per million output, versus $0.8125 / $4.87 for GPT-5.4, about 21% less when output is 3 tokens for every input token. These are the median prices buyers paid over the last 24 hours. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose Claude Sonnet 5.5 to cut cost; choose GPT-5.4 when its capabilities fit your task better.
Claude Sonnet 5.5 vs GPT-5.4, side by side
| Spec | Claude Sonnet 5.5 | GPT-5.4 |
|---|---|---|
| Price · input / 1M | $0.7610 | $0.8125 |
| Price · output / 1M | $3.80 | $4.87 |
| Context length | 1,000,000 | 1,000,000 |
| Max output tokens | 128,000 | 131,072 |
| Input modalities | text, image, file | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 62% off | 68% off |
| First token, median (7 days) | 2.9 s (134 requests) | — |
Median prices buyers paid on UberLLM over the last 24 hours. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated October 31, 2026.
Claude Sonnet 5.5 vs GPT-5.4 — FAQ
Is Claude Sonnet 5.5 or GPT-5.4 cheaper?
Claude Sonnet 5.5 is cheaper on a blended token mix, by about 21%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between Claude Sonnet 5.5 and GPT-5.4?
Claude Sonnet 5.5: $0.7610 in / $3.80 out per 1M tokens. GPT-5.4: $0.8125 in / $4.87 out per 1M tokens. That's roughly a 21% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5.5 and GPT-5.4 with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.