LLM Latency Tracker

Measure AI API latency and uptime across regions, and publish the results as open data.

🌐 Live rankings · JSON API · MCP endpoint

⚡ What it does

• 🌍 Regional measurements — compare provider response times and availability from distributed probe nodes.
• ⏱️ Two probe types — network time to first byte (TTFB) and optional inference time to first token (TTFT).
• 📈 Open dataset — daily rankings, historical snapshots and regional p50 / p95 statistics.
• 🤖 Agent access — JSON API, MCP, Markdown pages and an llms.txt index.
• 🗓️ Model lifecycle — a deprecation calendar with links to provider announcements.

🔧 Built for measurement

• Python standard-library core for edge probes; provider keys are needed for inference probes.
• SQLite storage and regional aggregation, with remote nodes shipping measurements to a central node.
• Static publishing for the website and JSON datasets.
• CI checks for tests and linting; published snapshots include their measurement date.

Reading the results: edge TTFB measures network/API responsiveness, not model generation speed. Compare it separately from inference TTFT; results depend on region, probe type and time window.

🚀 Quick start

Use the public data without installing anything:

curl https://llmlatency.dev/api/rankings.json

Or run edge probes locally with Python 3.12+:

git clone https://github.com/mazamaka/llm-latency-tracker.git
cd llm-latency-tracker
REGION=local python3 run.py
python3 aggregate.py --region local

For a local stdio MCP server over the published API (stdlib only, no keys):

python3 mcp_server.py

Tools: get_ai_api_latency (provider leaderboard per region), get_provider_latency (one provider across regions), get_model_deprecations (model shutdown calendar), get_coding_agent_health (Claude Code / Codex speed and accuracy drift). All read-only.

Inference probes, API access & site generation → · Deployment →

🧪 Contributing

Add a provider, bring a new probe region, or improve the measurement code. See CONTRIBUTING.md for setup and checks.

Python · SQLite · JSON API · MCP · Cloudflare Pages

Code: MIT · Data: CC-BY-4.0, with attribution to llmlatency.dev.