Enterprise SLA Guarantee

Accelerate enterprise AI adoption at scale

Unified LLM
API Gateway & Integration Hub

Q: How does 4SAPI empower enterprise AI?

4SAPI aggregates global leading models through a unified gateway, providing standardized APIs, intelligent routing, and full observability — enabling enterprises to launch AI products rapidly.

As a centralized AI model management platform, 4sAPI enables unified aggregation with granular access control. Say goodbye to complex integrations — one-stop access to 400+ global LLMs. A high-availability foundation for enterprises, rapid integration for developers.

Get StartedSupports B2B invoicing & dedicated technical onboarding

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Trusted by 100+ enterprise and innovative teams worldwide

OPENAIANTHROPICGOOGLEGROK

ISO 27001 Certified

API Uptime (SLA)99.99%

High Throughput

1.2M+ RPM

Global Avg Latency

24ms

End-to-end Encryption Enabled

AES-256 Enterprise Standard

One Key. Unlimited AI Power.

No more juggling multiple accounts. 4sAPI delivers the most stable API forwarding service — zero code changes, minutes to integrate, no compute limits.

GPT-5.4 ProPeak reasoning
GPT-5.4 TurboAll-round flagship
OpenAI o4-miniUltra-fast inference
Claude 4.6 OpusAgentic masterbrain
Claude 4.6 SonnetTop coding choice
DeepSeek V4Chinese all-round flagship
DeepSeek-R2Math & logic peak
Kimi K2.5 ThinkingUltra-long context
Gemini 3.1 ProNative video & audio
Gemini 3.1 FlashHigh-concurrency pick
Qwen 3 (Max)Enterprise compliance
GLM-5 (Plus)Proprietary base model
Llama 4 BehemothStrongest open-source
Llama 4 MaverickMassive doc processing
Grok 4Most up-to-date data
Midjourney V7.2
Flux.2 Pro
Sora 2.0 (Video)
Explore all LLM API solutions

4sAPI Enterprise Core: The 4S Architecture

Built around Speed, Stability, Security, and Scalability — the centralized AI management platform designed for production environments.

High Concurrency & Ultra-Low LatencySpeed

Challenge: Official API nodes get congested, causing extreme response delays.
Solution: High-concurrency architecture with intelligent load-balancing.
Outcome: Millisecond global routing, 24 ms average latency, zero perceived delay for your business.

Multi-Channel Failover & High AvailabilityStability

Challenge: A single-node failure brings down the entire business.
Solution: Proprietary multi-channel failover with automatic retry.
Outcome: Automatic failover guarantees 99.99% uptime — your business never goes offline.

End-to-End Encryption & ComplianceSecurity

Challenge: Unencrypted data transmission fails enterprise internal audit.
Solution: End-to-end AES-256 encryption with full-chain audit logging.
Outcome: Eliminates data-leak risk and fully satisfies ISO 27001 audit requirements.

Private & Hybrid Cloud DeploymentScalability

Challenge: Architecture can't scale horizontally as business explodes.
Solution: Supports on-premise private deployment and seamless hybrid cloud.
Outcome: Unified API aggregation scales infinitely with your business — no worries about headroom.

Transparent Billing & Permission Management

Challenge: Token usage is opaque, making cross-team reconciliation painful.
Solution: Multi-dimensional analytics with fine-grained sub-account permissions.
Outcome: Pay-as-you-go with precise budget control, no ban risk, full support for corporate invoicing.

Expert Team, Round-the-Clock Support

Challenge: Overseas vendors are unreachable; individual proxies carry disappearance risk.
Solution: Dedicated account management, 7×24 technical team on standby.
Outcome: Enterprise SLA signed and delivered, committed to permanent operation — enterprise procurement with full peace of mind.

Why 10,000+ developers worldwide choose 4sAPI

More than just lower prices
Enterprise-grade rock-solid reliability

Replace expensive direct API calls and unreliable low-end proxies. Our proprietary distributed scheduling delivers 10× cost savings, millisecond responses, and 100% privacy-safe API aggregation.

💰

No Hidden Billing

$1 = 500K quota. Every model, transparent pricing with zero hidden multipliers — up to 90% cheaper than direct official APIs.

⚡

Millisecond Concurrency

Globally distributed nodes with proprietary cache optimization. Blazing fast under heavy load — no spinner, no waiting.

🛡️

Enterprise-Grade Compliance

AES-256 key encryption at rest. Zero audit, zero log retention — your business secrets stay yours.

FAQ & Technical Support

Comprehensive answers about 4sAPI gateway services. We help enterprises achieve secure, stable, compliant AI model integration.

Tech

How does 4sAPI empower enterprise AI?

4sAPI aggregates global leading models through a unified gateway, providing standardized APIs, intelligent routing, and full observability — enabling enterprises to launch AI products rapidly while continuously optimizing cost and reliability.

Compliance

How is data security and compliance guaranteed?

The platform supports transport and storage encryption, least-privilege access, audit logging, and dedicated-line options. We can assist enterprises with compliance implementation to meet the strictest requirements in finance and government sectors.

Finance

Finance compliance: are invoices and bank transfers supported?

Yes — we support corporate bank transfers, contract signing, and VAT invoice issuance. Standard financial documentation can be provided to match your procurement process for audit and archiving.

Service

How is response speed maintained under high concurrency?

4sAPI uses a multi-node elastic architecture with intelligent scheduling. Resources are dynamically allocated based on traffic peaks, ensuring low latency and high availability even under heavy concurrent load.

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