> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rockapi.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Rock API vs OpenRouter vs LiteLLM: AI API Gateway Comparison (2026)

> Compare Rock API with OpenRouter, LiteLLM, and Portkey. Rock API offers 50 models from OpenAI, Anthropic, and Google at 0.7x standard pricing (30% savings).

# Rock API vs OpenRouter vs LiteLLM: AI API Gateway Comparison (2026)

Choosing an AI API gateway determines how much you pay per token, how many providers you can access through one integration, and how quickly you can switch models. This comparison covers the four most popular options in 2026: **Rock API**, **OpenRouter**, **LiteLLM**, and **Portkey**.

## What is Rock API?

Rock API is a unified AI API gateway that gives developers OpenAI-compatible access to **50 models** across **3 providers** — OpenAI (14 models), Anthropic (12 models), and Google (24 models) — at **0.7x standard pricing**. That means every API call costs 30% less than going direct to the provider.

* **Base URL:** `https://rockapi.ai/v1`
* **Compatibility:** Drop-in replacement for OpenAI SDK (just change `base_url`)
* **Pricing model:** Prepaid balance, pay-per-token at 0.7x rates
* **Key features:** Streaming, cached token pricing, usage dashboard, single API key for all providers

## Feature Comparison Table

| Feature                   | Rock API                      | OpenRouter   | LiteLLM          | Portkey             |
| ------------------------- | ----------------------------- | ------------ | ---------------- | ------------------- |
| **Total models**          | 50                            | 200+         | 100+ (self-host) | 250+                |
| **Providers**             | 3 (OpenAI, Anthropic, Google) | 20+          | Any (BYO keys)   | 15+                 |
| **Pricing vs direct**     | 0.7x (30% savings)            | 1.0x–1.2x    | Free (self-host) | 1.0x + platform fee |
| **OpenAI SDK compatible** | ✅ Yes                         | ✅ Yes        | ✅ Yes            | ✅ Yes               |
| **Streaming**             | ✅ Yes                         | ✅ Yes        | ✅ Yes            | ✅ Yes               |
| **Cached token pricing**  | ✅ Yes                         | ❌ No         | Depends on setup | ❌ No                |
| **Self-hosting required** | ❌ No                          | ❌ No         | ✅ Yes            | ❌ No                |
| **Single API key**        | ✅ Yes                         | ✅ Yes        | ❌ No (BYO keys)  | ✅ Yes               |
| **Fallback routing**      | Provider-level                | Model-level  | Model-level      | Model-level         |
| **Setup time**            | \< 2 minutes                  | \< 5 minutes | 30+ minutes      | \< 10 minutes       |

## Pricing Comparison: Real Numbers

The table below shows actual per-token costs for popular models as of May 2026:

| Model                 | Direct Price (Input/1M) | Rock API (Input/1M) | OpenRouter (Input/1M) | Savings with Rock API |
| --------------------- | ----------------------- | ------------------- | --------------------- | --------------------- |
| **Claude Sonnet 4.6** | \$3.00                  | \$2.10              | \$3.00                | 30%                   |
| **Claude Opus 4**     | \$15.00                 | \$10.50             | \$15.00               | 30%                   |
| **GPT-4o**            | \$2.50                  | \$1.75              | \$2.50                | 30%                   |
| **GPT-4o mini**       | \$0.15                  | \$0.105             | \$0.15                | 30%                   |
| **Gemini 2.5 Pro**    | \$1.25                  | \$0.875             | \$1.25                | 30%                   |
| **Gemini 2.5 Flash**  | \$0.09                  | \$0.063             | \$0.09                | 30%                   |

<Card title="See full pricing" icon="dollar-sign" href="/pricing-and-billing">
  View complete pricing for all 50 models including output tokens and cached token rates.
</Card>

## Cost Calculation Example

For a team spending **\$1,000/month** on AI API calls:

| Gateway               | Monthly cost    | Annual cost      | Annual savings vs direct |
| --------------------- | --------------- | ---------------- | ------------------------ |
| Direct APIs           | \$1,000         | \$12,000         | —                        |
| OpenRouter            | $1,000–$1,200   | $12,000–$14,400  | \$0 (or worse)           |
| **Rock API**          | **\$700**       | **\$8,400**      | **\$3,600**              |
| LiteLLM (self-hosted) | \$1,000 + infra | \$12,000 + infra | Negative (infra cost)    |

**At $10,000/month in API spend, Rock API saves $36,000/year.**

## When to Choose Rock API

Choose Rock API if you want:

* **Immediate cost savings** — 30% off every token with zero code changes
* **Simplicity** — One API key, one base URL, one bill for OpenAI + Anthropic + Google
* **Production-ready** — No infrastructure to maintain, no self-hosting complexity
* **Fast migration** — Switch in under 2 minutes by changing one line of code

Rock API is best for teams that use OpenAI, Anthropic, and Google models and want predictable savings without operational overhead.

## When to Choose OpenRouter

Choose OpenRouter if you need:

* Access to **niche or open-source models** (Mixtral, Llama, etc.) beyond the big three providers
* A **marketplace discovery** experience for experimenting with 200+ models
* You don't mind paying standard (or slightly above) pricing

OpenRouter is best for experimentation and accessing long-tail models. It does not offer pricing below direct rates.

## When to Choose LiteLLM

Choose LiteLLM if you need:

* **Full control** over routing logic, retries, and failover behavior
* To use your **own provider API keys** (BYO keys)
* A **self-hosted solution** within your VPC for compliance reasons
* You have DevOps capacity to maintain the proxy infrastructure

LiteLLM is best for platform teams building internal AI infrastructure. It requires deployment, monitoring, and maintenance.

## When to Choose Portkey

Choose Portkey if you need:

* **Observability-first** features (detailed logging, tracing, prompt management)
* Access to a wide model catalog with built-in guardrails
* Enterprise compliance features and SSO

Portkey is best for enterprises prioritizing observability over cost savings. Pricing is at or above direct rates plus a platform fee.

## Migration Code Example

Switching to Rock API requires changing only the `base_url`. Your existing OpenAI SDK code works unchanged:

```python theme={null}
from openai import OpenAI

# Before: direct OpenAI
# client = OpenAI(api_key="sk-...")

# After: Rock API (30% cheaper, same interface)
client = OpenAI(
    base_url="https://rockapi.ai/v1",
    api_key="your-rock-api-key",
)

response = client.chat.completions.create(
    model="claude-sonnet-4-20250514",
    messages=[{"role": "user", "content": "Hello!"}],
    stream=True,
)

for chunk in response:
    print(chunk.choices[0].delta.content, end="")
```

The same change works in Node.js, curl, or any OpenAI-compatible client:

```bash theme={null}
curl https://rockapi.ai/v1/chat/completions \
  -H "Authorization: Bearer your-rock-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-4o",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

## Summary

| Criteria                                 | Winner                   |
| ---------------------------------------- | ------------------------ |
| **Lowest per-token cost**                | Rock API (0.7x)          |
| **Most models**                          | Portkey / OpenRouter     |
| **Easiest migration**                    | Rock API (1 line change) |
| **Self-hosted / BYO keys**               | LiteLLM                  |
| **Best observability**                   | Portkey                  |
| **Best for OpenAI + Anthropic + Google** | Rock API                 |

## Get Started with Rock API

<Columns>
  <Card title="Sign up free" icon="rocket" href="https://rockapi.ai/sign-up?utm_source=docs&utm_medium=referral&utm_campaign=blog_comparison">
    Create your account and get an API key in under 2 minutes. Start saving 30% immediately.
  </Card>

  <Card title="Read the Quickstart" icon="book" href="/quickstart">
    Follow the step-by-step guide to make your first API call through Rock API.
  </Card>
</Columns>