OpenRouter Alternative: GPT & Claude at Up to 65% Off List Price
A focused comparison with OpenRouter: native Anthropic protocol support, fixed 65%/50% discounts on GPT/Claude list prices, per-token billing, and one key for both vendors.
What OpenRouter does well
OpenRouter aggregates hundreds of models — frontier, open-weight, and niche — behind one OpenAI-compatible API with one balance, and its router can fall back across providers when one degrades. For teams that sample many small or open models, that breadth is hard to beat.
If your workload lives on open-weight models or you need per-provider routing controls, OpenRouter remains a solid choice. The comparison below is only about what happens when your traffic is mostly GPT and Claude.
Where this API differs
Two differences matter day to day. First, protocol: alongside the OpenAI-compatible endpoint, the native Anthropic Messages API is served as a first-class citizen — Claude Code, Claude SDK apps, and prompt-caching headers work without an OpenAI-shaped translation layer.
Second, pricing shape: the discount is a fixed multiplier applied at billing — 65% off every GPT model and 50% off every Claude model from the official list price. There is no per-model markup table to audit; the rate you see for a model is the vendor list price times a constant.
Pricing, concretely
At this API's rates, GPT-5.6 Sol is $1.75 per 1M input tokens and $10.50 per 1M output (official list: $5.00 / $30.00); Claude Sonnet 4.6 is $1.50 / $7.50 (list: $3.00 / $15.00). Billing is per token with no minimums or seat fees.
OpenRouter's prices vary by underlying provider and fee structure, so compare live numbers on their model pages for the models you actually call before deciding.
Migrating from OpenRouter
OpenAI-SDK code migrates by changing the base URL and key — model ids for GPT models are the vendor's canonical ids. Anthropic-SDK code sets the same host and keeps using the Messages API shape.
Both protocol styles run on one key, so a gradual migration (move Claude traffic first, keep GPT on the old route during evaluation) is a config change, not a rewrite.
FAQ
Is this cheaper than OpenRouter?
For GPT and Claude traffic it usually is: the rate is the official list price minus a fixed 65% (GPT) or 50% (Claude). OpenRouter pricing depends on provider and fees, so compare against their live model pages for your specific models.
Does it support the Anthropic Messages API natively?
Yes — the native Anthropic protocol is served directly, so Claude Code and Anthropic-SDK clients work without an OpenAI-compatibility shim.
Should I fully replace OpenRouter?
Not necessarily. This API covers GPT and Claude models. If you also rely on OpenRouter for open-weight or niche models, running both side by side is a common setup.