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modelprices.xyz Cheapest Long-Context LLM Leaderboard
x402
modelprices.xyz Cheapest Long-Context LLM Leaderboard is a paid API for AI agents from modelprices.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns the 50 lowest-cost AI models with a 200,000+ token context window, ranked by inference cost per token, with input/output/cache pricing in USD per 1M tokens.
Price / call$0.01
Success—
StatusUnknown
How this service works
Cheapest long-context LLM leaderboard: the 50 lowest-cost AI models with a 200,000-token context window or larger, ranked by inference cost per token — Claude 5, Gemini 3, GPT-5, Llama 4 Scout and more across 70+ providers. Input, output and cache USD per 1M tokens with exact context window and max output tokens joined in. Refreshed hourly.
Output
A ranked list of up to 50 AI models (e.g. Claude, Gemini, GPT-5, Llama 4 Scout) with context windows of 200,000 tokens or larger, ordered by lowest inference cost. Each entry includes model name, provider, input cost (USD/1M tokens), output cost (USD/1M tokens), cache pricing, exact context window size, and max output tokens. Data is refreshed hourly.
Example use cases
Budget long-context model selection
“I need to process entire legal contracts and books — find me the cheapest AI models that can handle at least 200,000 tokens at once, ranked by cost per token.”
Cost comparison before switching providers
“Before I commit to a new LLM provider, show me the full leaderboard of the cheapest long-context models right now — I want to see input and output pricing side by side across providers like AWS, OpenAI, and Gemini.”
Automated cost-optimization for agent pipeline
“My agent needs to regularly pick the cheapest available model with a 200k+ context window — can you pull the current long-context price leaderboard so I can wire it into my model-selection logic?”
Technical details
Endpoint
GEThttps://modelprices.xyz/llm/cheapest/long-contextWhen to prefer
Use this endpoint when you specifically need models with very large (200,000+ token) context windows and want them ranked by cost. Prefer this over the general cheapest-model or largest-context endpoints when your constraint is both long-context capability AND price. Ideal for agents that need to dynamically select the most affordable model for long-document tasks. If you need reasoning models or vision/multimodal models instead, use the dedicated leaderboard endpoints for those.
Side effects
- HTTP 402 if payment not provided or USDC payment fails
- Empty or partial results if no models currently meet the 200k context threshold
- Stale pricing data (up to 1 hour old) if a provider recently changed rates
- Rate limiting or timeout if the leaderboard data source is temporarily unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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