byesu vs OpenRouter: Choosing an AI API Gateway
Short version: OpenRouter is the industry benchmark for model aggregation — 400+ models from 70+ providers behind a single OpenAI-style API, with provider prices passed through at zero inference markup. byesu is a smaller, focused gateway: one key covers Claude, GPT-5.6, Grok and Gemini through two API formats — OpenAI-compatible /v1/chat/completions and Anthropic-native /v1/messages — billed pay-as-you-go with a flat multiplier table (input 1x / output 5x / cache hit 0.1x) and top-ups via USDT or Alipay. Want maximum breadth? Pick OpenRouter. Built around Anthropic-format clients or cache-heavy agent loops? byesu is for you.
Every OpenRouter claim below was verified against openrouter.ai/docs in July 2026; anything we could not verify is not on this page.
At a Glance
| Dimension | byesu | OpenRouter |
|---|---|---|
| API formats | OpenAI-compatible and Anthropic-native /v1/messages | OpenAI schema only; no Anthropic endpoint in its API reference (docs, July 2026) |
| Prompt caching | One table for all models: input 1x / output 5x / cache hit 0.1x | Provider pass-through: Claude reads 0.1x, writes 1.25x–2x; OpenAI reads 0.25x–0.5x (docs) |
| Inference pricing | Public multipliers; live billed price in the console | List-price pass-through, "without any markup on inference pricing" (FAQ) |
| Credit purchase fees | Balance top-up in the console | Stripe 5.5% ($0.80 min); crypto 5% (FAQ, July 2026) |
| BYOK | Not offered | 5% of normal cost, first 1M requests/month free (docs) |
| Payments | USDT, Alipay | Major credit cards, AliPay, USDC; PayPal planned (FAQ) |
| Model coverage | Curated: Claude, GPT-5.6, Grok, Gemini + image/video | 400+ models, 70+ providers (homepage) |
| Subscription | None — pay-as-you-go | None — prepaid credits |
API Protocols: One Schema vs Two
OpenRouter made a clean architectural bet: normalize everything. Its docs state that it implements "the OpenAI API specification for /completions and /chat/completions endpoints" — any OpenAI SDK works unchanged, and one request format reaches 400+ models. A genuinely excellent design if you are standardized on the OpenAI schema.
The trade-off shows up with Anthropic-format clients. As of July 2026, the OpenRouter API reference documents OpenAI-schema endpoints only, with no Anthropic /v1/messages endpoint. Tools that speak the Anthropic Messages API natively — Claude Code, the Anthropic SDKs — need a translation layer in between.
byesu runs both formats side by side: OpenAI-compatible calls use https://byesu.com/v1/chat/completions, and Anthropic-native clients get a real /v1/messages endpoint:
# Anthropic-native — for Claude Code, Anthropic SDKs
curl https://byesu.com/v1/messages \
-H "Authorization: Bearer sk-YOUR_TOKEN" \
-H "anthropic-version: 2023-06-01" \
-H "Content-Type: application/json" \
-d '{"model":"claude-opus-4.8","max_tokens":512,
"messages":[{"role":"user","content":"Summarize this design doc in five bullets."}]}'Any model is served through either format — which is how Grok 4.5 or GPT-5.6 run inside Claude Code with three environment variables (setup guide).
Prompt Caching Billing
Both platforms handle caching honestly; the structure differs.
OpenRouter passes through each provider figure (docs/features/prompt-caching, July 2026): Anthropic models bill cache writes at 1.25x input (5-minute TTL) or 2x (1-hour TTL) and cache reads at 0.1x; OpenAI models bill writes at no cost and reads at 0.25x–0.5x; Gemini 2.5 reads at 0.25x, DeepSeek at 0.1x. Faithful to every upstream — but your cost model changes with each provider.
byesu uses one multiplier table for the whole platform: input 1x, output 5x, cache hit 0.1x, relative to each model's base price. The 0.1x cache-hit rate mirrors the official Anthropic cache-read ratio and applies consistently, so cache-heavy cost math looks the same whichever model you route to. The console shows your live billed price next to the official list price.
For agent workloads that re-read a large context every turn — Claude Code sessions, long tool loops — the cache-hit rate often dominates the bill; model it before choosing.
Billing Structure and Fees
OpenRouter is transparent and fully published: provider pricing passes through "without any markup on inference pricing" (FAQ); it monetizes at deposit time instead — Stripe purchases carry a 5.5% fee ($0.80 minimum), crypto a 5% fee (FAQ, July 2026). BYOK costs 5% of what the same model/provider would cost normally on OpenRouter, first 1 million requests each month free (docs/use-cases/byok).
byesu bills per token with public group multipliers (input 1x / output 5x / cache hit 0.1x). For orientation, official list prices: GPT-5.6 Sol $5 / $30 per million input/output tokens, Terra $2.5 / $15, Luna $1 / $6, Grok 4.5 $2 / $6 (cached input $0.50), Claude Opus 4.8 $5 / $25 — the console shows the price you actually pay next to them, live.
Payment Methods
OpenRouter accepts all major credit cards, AliPay and cryptocurrency payments in USDC, with PayPal planned (FAQ, July 2026). On byesu, you top up with USDT or Alipay.
Model Coverage
No contest on breadth: OpenRouter lists 400+ models from 70+ providers (homepage, July 2026), with public rankings and provider routing; if you evaluate many models or need niche open-weight checkpoints, it is the obvious pick — no asterisk.
byesu curates a frontier set instead: Claude (including Opus 4.8), the GPT-5.6 family (Sol / Terra / Luna), Grok 4.5 and Gemini — plus media models with posted per-unit prices: gpt-image-2 $0.01/image, veo-3.1 $0.01875/second of video, seedream-4.5 $0.05/image, nano-banana-2 $0.025/image. Fewer models, but every one reachable through both API formats with a single key.
Which One Should You Pick?
Choose OpenRouter if you:
- Need breadth — hundreds of models and fast access to new releases
- Are standardized on the OpenAI schema and want provider routing, fallbacks and rankings
- Want BYOK with your own provider accounts, or prefer paying by card or USDC
Choose byesu if you:
- Run Anthropic-format clients and want a native
/v1/messagesendpoint with no translation layer - Operate cache-heavy agent loops and want one predictable multiplier table across all models
- Top up with USDT or Alipay
- Want image and video models behind the same key as your text models
The two are not mutually exclusive: many teams use OpenRouter for exploration and byesu for Anthropic-format production traffic. Both are pay-as-you-go, so the switching cost is roughly one base URL.
Related Links
- Quick Start (3 steps) — create a token · set the address · pick a model
- Claude Code CLI Setup — environment variables and one-click script
- Console Sign-up / Create Token — get an
sk-token and see live pricing
FAQ
Is byesu a good OpenRouter alternative?
It depends on your workload. OpenRouter offers 400+ models from 70+ providers behind one OpenAI-style API with no inference markup. byesu is a focused AI API gateway with OpenAI-compatible and Anthropic-native endpoints, a flat multiplier table (input 1x, output 5x, cache hit 0.1x), and top-ups via USDT or Alipay. Teams built around Anthropic-format clients or cache-heavy agents often prefer byesu; teams that need maximum breadth should use OpenRouter.
Does OpenRouter support the Anthropic /v1/messages API format?
As of July 2026, the OpenRouter documentation describes the OpenAI API specification for /completions and /chat/completions, and its API reference does not document an Anthropic-native /v1/messages endpoint. byesu exposes both formats, so Anthropic-format clients such as Claude Code connect directly.
What fees does OpenRouter charge when buying credits?
According to the official OpenRouter FAQ (July 2026), Stripe credit purchases carry a 5.5% fee with a $0.80 minimum and crypto payments a 5% fee, with no markup on inference pricing. Using your own provider keys (BYOK) costs 5% of the normal price after the first 1 million BYOK requests each month.
How does prompt caching billing compare between byesu and OpenRouter?
byesu bills every model with one multiplier table: input 1x, output 5x, cache hit 0.1x, with the live billed price shown in the console. OpenRouter passes through the cache pricing of each provider: for Anthropic models, cache writes cost 1.25x input (5-minute TTL) or 2x (1-hour TTL) and cache reads 0.1x; OpenAI cache reads cost 0.25x to 0.5x with free writes. Both preserve official cache economics; byesu keeps the math uniform across models.
Which gateway should I use with Claude Code?
Claude Code speaks the Anthropic Messages API. byesu exposes a native /v1/messages endpoint, so you point ANTHROPIC_BASE_URL at https://byesu.com, set your token, and any model on the platform runs inside Claude Code. OpenRouter documents OpenAI-schema endpoints, so an Anthropic-format client needs a translation layer.