For 10,000 requests of 2,000 tokens in and 500 out, GPT-6.1 Sol costs 44% less than Claude Sonnet 5.5 on Zurelay: $22.50 against $40.50. Both are below their labs' list prices: 55% for Claude Sonnet 5.5 and 75% for GPT-6.1 Sol.
Side by side
| Claude Sonnet 5.5 | GPT-6.1 Sol | |
|---|---|---|
| Lab | Anthropic | OpenAI |
| Released | Sep 28, 2026 | Sep 29, 2026 |
| Context window | 1M tokens | 1.05M tokens |
| Max output | 128K tokens | 128K tokens |
| Reads | Text, Images, PDFs | Text, Images, PDFs |
| Reasoning levels | low, medium, high, xhigh, max | low, medium, high, xhigh, max |
| Price per 1M, in / out | $0.90 / $4.50 | $0.50 / $2.50 |
| Lab list price | $2.00 / $10.00 | $2.00 / $10.00 |
| Cached input per 1M | $0.09 | $0.025 |
| 10K typical requests | $40.50 | $22.50 |
Prices in US dollars per 1M tokens on Zurelay, live from the catalog. A typical request is 2,000 tokens in and 500 out. Output limits are each lab's.
What they're for
Claude Sonnet 5.5 is Anthropic's current Sonnet model, which Anthropic calls its best combination of speed and intelligence. The Zurelay Claude Sonnet 5.5 API serves it through an OpenAI-compatible or Anthropic-compatible endpoint at 55% below list price, for teams running coding, agent and document work at volume.
GPT-6.1 Sol is OpenAI's newest Sol model, released on September 29, 2026. OpenAI says it nearly matches GPT-6 Astra on agentic coding, computer use and professional work at one-fifth of Astra's list price per token. The GPT-6.1 Sol API on Zurelay serves it through one OpenAI-compatible endpoint, below OpenAI's list price.
Try both
Specs don't say which model handles your work better. Send the same requests to both and compare the answers, the tokens and the bill. On Zurelay that's a change of model name.
Every model from both labs is on Claude vs GPT. To price a whole month, use the LLM cost calculator.
from openai import OpenAIclient = OpenAI(base_url="https://api.zurelay.com/v1", api_key="YOUR_ZURELAY_KEY")prompt = [{"role": "user", "content": "Summarize this contract: ..."}]# Same key, same code: only the model name changesfor model in ["claude-sonnet-5-5", "gpt-6.1-sol"]: reply = client.chat.completions.create(model=model, messages=prompt) print(model, reply.usage.total_tokens, reply.choices[0].message.content[:200])FAQ
Anything else? Ask our team and we’ll answer by email.
For 10,000 requests of 2,000 tokens in and 500 out, GPT-6.1 Sol costs 44% less than Claude Sonnet 5.5 on Zurelay: $22.50 against $40.50. Per 1M tokens, Claude Sonnet 5.5 is $0.90 input and $4.50 output, and GPT-6.1 Sol is $0.50 and $2.50.
GPT-6.1 Sol, at 1.05M tokens, against 1M for Claude Sonnet 5.5.
Yes. One Zurelay key calls both. With an OpenAI SDK, point it at https://api.zurelay.com/v1 and change only the model name, claude-sonnet-5-5 or gpt-6.1-sol, to switch.
Yes. Each model is served over several routes run by independent sellers, and every route is tested before it serves requests and every day after, with identity, dated-knowledge and reasoning checks that catch an older or different model sold under the name you asked for.
Create a key in seconds, point the SDK you already use at Zurelay, and every request costs up to 90% less from the first token.