FullsendAI vs OpenRouter
FullsendAI vs OpenRouter
Both give you one key for many models. OpenRouter has far more models and lets you steer between providers; FullsendAI adds nothing when you top up, runs every model in the USA, and comes with a web chat, one-command setup for your coding agents and its own security-tuned models.
Which one fits
Choose FullsendAI if…
- You want to pay the token price and nothing on top. OpenRouter charges 5.5% by card ($0.80 minimum) and 5% in crypto when you buy credits; FullsendAI charges no fee on top-ups.
- You need every request served in the United States.
- You want your coding agents and a web chat on the same balance as your API key.
- You do security research or code audits and want Nef 4.0 and Sifu 3.5, models tuned for that work.
Choose OpenRouter if…
- You need a model or a provider we don't carry: OpenRouter lists 456 models.
- You want to order providers, set fallbacks or filter by precision yourself.
- You want to bring your own provider keys, or use free models with a daily quota.
- You need a published SOC 2 Type 2 report today.
At a glance
Each OpenRouter cell links to its source and the date we checked it.
What it is
- FullsendAI
- One API key, a web chat and one-command setup for coding agents
- OpenRouter
- Router in front of many model providersSource ·
Models
- FullsendAI
- 4 models
- OpenRouter
- 456 modelsSource ·
Markup on model prices
- FullsendAI
- 0% on open models
- OpenRouter
- None on inference, per its FAQSource ·
Fee on card top-ups
- FullsendAI
- None
- OpenRouter
- 5.5% when you buy credits, $0.80 minimumSource ·
Fee on crypto top-ups
- FullsendAI
- None
- OpenRouter
- 5% when you buy creditsSource ·
Ways to pay
- FullsendAI
- Card and crypto (USDC, USDT and more)
- OpenRouter
- Card and cryptoSource ·
Free to try
- FullsendAI
- No free credit; pay as you go from $5
- OpenRouter
- Free models: 50 requests a day, or 1,000 after buying 10 creditsSource ·
OpenAI-compatible API
- FullsendAI
- Yes (Chat Completions)
- OpenRouter
- YesSource ·
Anthropic Messages API
- FullsendAI
- Yes; works with Claude Code
- OpenRouter
- Yes; documents Claude Code setupSource ·
Claude, GPT and Gemini
- FullsendAI
- Not yet
- OpenRouter
- YesSource ·
Routing and failover
- FullsendAI
- We pick the host, with automatic failover; no provider controls
- OpenRouter
- Provider ordering, fallbacks and filters you controlSource ·
Bring your own key
- FullsendAI
- No
- OpenRouter
- Free up to $25,000 a month of list-price usage, then 5%Source ·
Where inference runs
- FullsendAI
- United States, every model
- OpenRouter
- Many providers; the route decides the regionSource ·
Prompt logging by default
- FullsendAI
- API prompts not stored unless you turn on 30-day body storage
- OpenRouter
- Prompts not logged by default; opt in for a 1% discountSource ·
Audits and certifications
- FullsendAI
- No third-party audit report published yet
- OpenRouter
- SOC 2 Type 2 (trust center)Source ·
Refunds
- FullsendAI
- See the Terms of Service
- OpenRouter
- Within 24 hours; fees not refunded; crypto never refundedSource ·
Web chat
- FullsendAI
- Yes
- OpenRouter
- Yes (chatroom)Source ·
Desktop coding agent
- FullsendAI
- Not yet: one command sets up Claude Code, Codex and more
- OpenRouter
- No desktop agent; setup guides for third-party agentsSource ·
Own tuned models
- FullsendAI
- Nef 4.0 and Sifu 3.5, tuned for security research and code
- OpenRouter
- No; routers such as openrouter/autoSource ·
Public model rankings
- FullsendAI
- Yes, graded on public benchmarks
- OpenRouter
- Yes (usage rankings)Source ·
| Feature | FullsendAI | OpenRouter |
|---|---|---|
| What it is | One API key, a web chat and one-command setup for coding agents | Router in front of many model providersSource · |
| Models | 4 models | 456 modelsSource · |
| Markup on model prices | 0% on open models | None on inference, per its FAQSource · |
| Fee on card top-ups | None | 5.5% when you buy credits, $0.80 minimumSource · |
| Fee on crypto top-ups | None | 5% when you buy creditsSource · |
| Ways to pay | Card and crypto (USDC, USDT and more) | Card and cryptoSource · |
| Free to try | No free credit; pay as you go from $5 | Free models: 50 requests a day, or 1,000 after buying 10 creditsSource · |
| OpenAI-compatible API | Yes (Chat Completions) | YesSource · |
| Anthropic Messages API | Yes; works with Claude Code | Yes; documents Claude Code setupSource · |
| Claude, GPT and Gemini | Not yet | YesSource · |
| Routing and failover | We pick the host, with automatic failover; no provider controls | Provider ordering, fallbacks and filters you controlSource · |
| Bring your own key | No | Free up to $25,000 a month of list-price usage, then 5%Source · |
| Where inference runs | United States, every model | Many providers; the route decides the regionSource · |
| Prompt logging by default | API prompts not stored unless you turn on 30-day body storage | Prompts not logged by default; opt in for a 1% discountSource · |
| Audits and certifications | No third-party audit report published yet | SOC 2 Type 2 (trust center)Source · |
| Refunds | See the Terms of Service | Within 24 hours; fees not refunded; crypto never refundedSource · |
| Web chat | Yes | Yes (chatroom)Source · |
| Desktop coding agent | Not yet: one command sets up Claude Code, Codex and more | No desktop agent; setup guides for third-party agentsSource · |
| Own tuned models | Nef 4.0 and Sifu 3.5, tuned for security research and code | No; routers such as openrouter/autoSource · |
| Public model rankings | Yes, graded on public benchmarks | Yes (usage rankings)Source · |
Prices, model for model
USD per million tokens, input / output. FullsendAI prices are read live from our catalogue. OpenRouter's providers charge different prices for one model: we show the price most of them charge, with the lowest-priced endpoint and its precision beneath.
DeepSeek V4.1 FlashDeepSeek
- FullsendAI
- Not offered yet
- OpenRouter
- $0.30 / $1.20from $0.022 / $0.192 (fp8, Morph)deepseek/deepseek-v4.1-flashSource ·
GLM 5.3 FlashZ.ai
- FullsendAI
- Not offered yet
- OpenRouter
- $0.15 / $0.50from $0.0189 / $0.0625 (fp4, OpenInference)z-ai/glm-5.3-flashSource ·
GPT OSS 120BOpenAI
- FullsendAI
- Not offered yet
- OpenRouter
- $0.15 / $0.60from $0.03 / $0.15 (fp4, Near AI)openai/gpt-oss-120bSource ·
GPT OSS 20BOpenAI
- FullsendAI
- Not offered yet
- OpenRouter
- $0.07 / $0.15from $0.018 / $0.09 (fp8, Darkbloom)openai/gpt-oss-20bSource ·
Kimi K2.6Moonshot AI
- FullsendAI
- Not offered yet
- OpenRouter
- $0.95 / $4.00from $0.39 / $1.80 (int4, Chutes)moonshotai/kimi-k2.6Source ·
Qwen3.8 MaxAlibaba
- FullsendAI
- Not offered yet
- OpenRouter
- $2.00 / $6.00qwen/qwen3.8-max-0902Source ·
DeepSeek V4 Pro 0813DeepSeek
- FullsendAI
- Not offered yet
- OpenRouter
- $1.32 / $3.96from $0.675 / $1.20 (fp4, Sail Research)deepseek/deepseek-v4-pro-0813Source ·
Claude Opus 5.5Anthropic
- FullsendAI
- Not offered yet
- OpenRouter
- $4.00 / $20.00anthropic/claude-opus-5.5Source ·
Gemini 3.1 ProGoogle
- FullsendAI
- Not offered yet
- OpenRouter
- $2.00 / $12.00google/gemini-3.1-pro-previewSource ·
| Model | FullsendAI | OpenRouter |
|---|---|---|
| DeepSeek V4.1 FlashDeepSeek | Not offered yet | $0.30 / $1.20from $0.022 / $0.192 (fp8, Morph)deepseek/deepseek-v4.1-flashSource · |
| GLM 5.3 FlashZ.ai | Not offered yet | $0.15 / $0.50from $0.0189 / $0.0625 (fp4, OpenInference)z-ai/glm-5.3-flashSource · |
| GPT OSS 120BOpenAI | Not offered yet | $0.15 / $0.60from $0.03 / $0.15 (fp4, Near AI)openai/gpt-oss-120bSource · |
| GPT OSS 20BOpenAI | Not offered yet | $0.07 / $0.15from $0.018 / $0.09 (fp8, Darkbloom)openai/gpt-oss-20bSource · |
| Kimi K2.6Moonshot AI | Not offered yet | $0.95 / $4.00from $0.39 / $1.80 (int4, Chutes)moonshotai/kimi-k2.6Source · |
| Qwen3.8 MaxAlibaba | Not offered yet | $2.00 / $6.00qwen/qwen3.8-max-0902Source · |
| DeepSeek V4 Pro 0813DeepSeek | Not offered yet | $1.32 / $3.96from $0.675 / $1.20 (fp4, Sail Research)deepseek/deepseek-v4-pro-0813Source · |
| Claude Opus 5.5Anthropic | Not offered yet | $4.00 / $20.00anthropic/claude-opus-5.5Source · |
| Gemini 3.1 ProGoogle | Not offered yet | $2.00 / $12.00google/gemini-3.1-pro-previewSource · |
What a month costs, fees included
Same model, same tokens, no cache hits, one card top-up for exactly what the tokens cost.
No model has a current price on every side today, so there is no like-for-like example to show. See the price table above.
Key differences
Fees and billing
OpenRouter's FAQ says it adds no markup to inference prices; it charges when you buy credits: 5.5% by card ($0.80 minimum) and 5% in crypto. Unused credit can be refunded within 24 hours, without the fees. FullsendAI charges each model's per-token price and nothing when you top up, by card or crypto, from $5.
Models and routing
OpenRouter lists 456 models and lets you steer each request between providers. One model can cost very different amounts depending on the provider, and the lowest-priced endpoints are often quantized (fp4 or int4). FullsendAI carries 4 models, picks the host for you and fails over automatically; you can't choose a provider or precision.
Hosting and privacy
OpenRouter sends each request to one of many providers, so where it runs depends on the route; it doesn't log prompts by default and offers a 1% discount if you opt in. FullsendAI runs every model in the USA and stores API prompts only when you turn on body storage, for 30 days.
Apps and models of its own
OpenRouter is an API with a chatroom and setup guides for third-party agents. FullsendAI adds a web chat and one-command setup for Claude Code, Codex and other coding agents on the same balance, plus Nef 4.0 and Sifu 3.5, our own models for security research and code.
Where OpenRouter is the better choice
- Breadth: 456 models, plus image and audio models we don't offer.
- Control: provider ordering, fallbacks, precision filters and per-request privacy settings.
- Bring your own keys: free up to $25,000 a month of list-price usage, then 5%.
- Assurance: SOC 2 Type 2 (trust center), where FullsendAI has no third-party report published yet.
- Free models with a daily quota: 50 requests a day, or 1,000 after buying 10 credits.
Migrate in 2 minutes
Change the base URL, the key and the model name. Everything else stays: streaming, tool calls and images work as before.
from openai import OpenAI
client = OpenAI(
base_url="https://fullsendai.com/v1",
api_key="fs_live_...",
)
reply = client.chat.completions.create(
model="deepseek-v4.1-flash",
messages=[{"role": "user", "content": "Hello"}],
)Full setup for every tool is in the quickstart and agent guides.
Questions
Is FullsendAI cheaper than OpenRouter?
Per model, it depends: see the price table, checked Oct 30, 2026. At the same per-token price, the difference is the fee, 5.5% by card ($0.80 minimum) and 5% in crypto at OpenRouter against none at FullsendAI. OpenRouter's lowest-priced endpoints for some open models are quantized and cost less than ours.
Can I use my OpenRouter code unchanged?
Almost. Change the base URL, the API key and the model name; the request and response formats are the standard OpenAI Chat Completions and Anthropic Messages ones. Options specific to one provider have no equivalent here, so remove them.
Does Claude Code work with FullsendAI?
Yes. Set ANTHROPIC_BASE_URL to our address and ANTHROPIC_AUTH_TOKEN to your FullsendAI key; the setup is in the migration section above.
Where does FullsendAI run models?
In the United States, every model. Requests are never routed abroad, not even when a host is busy.
Does FullsendAI keep my prompts?
Not from the API unless you ask: by default only what billing needs (tokens, cost, timing, status). If you turn on body storage for a project, its requests and replies are kept for 30 days so you can read them in Logs, then deleted.
Can I pay FullsendAI with crypto?
Yes. Top up or prepay a plan in USDC, USDT and more, with no fee on the top-up. Cards work too, through Stripe.
Related comparisons
One key. Every model. No top-up fee.
Works with the OpenAI and Anthropic SDKs, Claude Code, Codex and other coding agents. Every model runs in the USA.