How to Choose the Best AI Model (Live, in Your Editor)
Blog post from OpenRouter
Choosing an AI model requires matching it to a specific task, budget, latency requirement, and current market conditions rather than relying on a universal leaderboard winner. OpenRouter recommends a six-step process: define the production task, shortlist models using live usage data and third-party benchmarks, compare provider-level pricing and performance, test candidates on realistic prompts, measure cost per successful completed task, and either select a clear winner or use its Auto Router for per-request routing. Its hosted MCP server lets developers access model catalogs, rankings, benchmarks, endpoint latency, pricing, and billable test calls directly from editors such as Claude Code, Cursor, and Codex CLI. The guidance emphasizes that benchmarks are useful filters but cannot replace evaluations on difficult real-world inputs, while cost per token can be misleading because retries, output length, reasoning behavior, and failure rates may make a nominally cheaper model more expensive overall. Different workloads prioritize different properties, such as context length and input pricing for summarization, schema compliance for extraction, low latency for chat, image support for vision, and reliable multi-step instruction following for agents. Because new models and provider conditions change frequently, the article advises treating selection as an ongoing operational process supported by repeatable evaluations, monitoring, fallbacks, and periodic reassessment.
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