MModelStats

The ModelStats blog

LLM performance, in the open

Data-driven insights on LLM API speed, latency and reliability — backed by real monitoring data.

Latest 4 min read

What's a Good TTFT for a Production LLM App?

What counts as a good TTFT for an LLM API? Practical target ranges by use case — chat, autocomplete, agents — and why you should budget for the P95 tail.

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· 4 min

GPT-4o vs Gemini Flash: Latency and Throughput Compared

How GPT-4o and Google's Gemini Flash compare on TTFT, total latency, and throughput, plus what the speed-versus-finish tradeoff means for your app.

· 4 min

GPT-4o vs Gemini 3.5 Flash: Latency and Throughput Compared

How do GPT-4o and Gemini 3.5 Flash compare on TTFT, latency, and throughput? We break down the speed tradeoffs using real monitoring data and vendor benchmarks.

· 4 min

Cheapest LLM API for High Throughput in 2026

The cheapest LLM APIs for high-throughput work in 2026: DeepSeek V4-Pro's 75% price cut, Gemini's fast Flash tier, and how to weigh cost vs tokens/sec.

· 3 min

Claude Opus 4.8 Speed Test — First Look at Performance Data

Anthropic just shipped Claude Opus 4.8. We added it to ModelStats on day one. Here's the early TTFT, throughput, and latency data versus Opus 4.7, GPT-4o, and Gemini.

· 2 min

Claude Opus 4.8 vs 4.7: What Changed, and Is It Actually Faster?

A side-by-side look at Claude Opus 4.8 versus Opus 4.7 — pricing, agentic coding gains, fast mode, and real API latency and throughput data from ModelStats.

· 2 min

Claude Opus 4.7 Speed Test — First Look at Performance Data

Real-time performance data for Claude Opus 4.7. How fast is Anthropic's latest flagship compared to Opus 4.6, GPT-4o, and Gemini?

· 3 min

LLM Speed Comparison 2026 — Every Major Model Ranked

Complete speed comparison of 16 LLM APIs: Claude, GPT-4, Gemini, DeepSeek. Ranked by TTFT, throughput, and latency with real monitoring data.

· 2 min

OpenAI o3 Latency & TTFT — Complete Performance Guide

Real-time o3 performance data: TTFT, latency, tokens per second, and how it compares to o4-mini, GPT-4o, and DeepSeek R1.

· 3 min

LLM API Latency Spikes: What Average TTFT Doesn't Tell You

Every LLM API has latency spikes. We analyzed 24 hours of real ping data to show the gap between P50 and P99 for Claude, GPT-4, Gemini, and DeepSeek.

· 4 min

Claude vs GPT-4 vs Gemini — A Real Latency Comparison

· 3 min

Understanding LLM Performance Metrics: TTFT, ITL, and Why They Matter

· 3 min

Which LLM API Is Fastest? Real-Time Data for April 2026