TL;DR — This is the index of our model-vs-model pricing comparisons. Every page follows the same contract: rates pulled from the weekly-verified pricing tracker (never from memory or other blogs), a real monthly-workload cost calculation, and a routing verdict. Pick your pair below, or run your own numbers in the LLM cost calculator.
Inside one provider (which tier do I need?)
The same-family choice is usually about escalation share, not model quality:
- Claude Fable 5 vs Claude Opus 5 — the apex-vs-workhorse 2× step
- Claude Opus 5 vs Claude Sonnet 5 — the classic two-rung setup
- Claude Sonnet 5 vs Claude Haiku 4.5 — the cleanest 2× in the ladder
- GPT-5.5 vs GPT-5.4 — OpenAI's 2× step
- GPT-5.4 vs GPT-4o — same input price, output decides
- GPT-4o vs GPT-4o-mini — the 17× gap that funds routing
- Gemini 3 Pro vs Gemini 3 Flash — Google's quality/bulk split
- DeepSeek V4 Pro vs DeepSeek V4 Flash — cheap output at both tiers
Frontier head-to-heads (cross-provider)
- Claude Opus 5 vs GPT-5.5 — same input, 17% output gap
- Claude Opus 5 vs GPT-5.4 — list price vs cache math
- Claude Sonnet 5 vs GPT-5.4 — the promo-window matchup
- Claude Opus 5 vs Gemini 3 Pro — the widest quality-tier gap (4–5×)
- Claude Sonnet 5 vs Gemini 3 Pro — the default-reasoning A/B
- GPT-5.4 vs Gemini 3 Pro — 3× output gap
- Claude Fable 5 vs GPT-5.5 — the top-shelf duel
Budget-tier fights (where volume lives)
- Claude Haiku 4.5 vs GPT-4o-mini — two different rungs, not competitors
- Claude Haiku 4.5 vs Gemini 3 Flash — judgment vs floor price
- GPT-4o-mini vs Gemini 3 Flash — exactly half on both sides
- GPT-4o-mini vs DeepSeek V4 Flash — tied input, halved output
- Gemini 3 Flash vs DeepSeek V4 Flash — the absolute floor fight
Value-reasoning tier (the 2026 story)
The crowded middle is where routing pays most:
- DeepSeek V4 Pro vs Gemini 3 Pro — a true crossover: your token ratio decides
- DeepSeek V4 Pro vs GLM-5.1 — flat rate vs tiered billing
- DeepSeek V4 Pro vs Kimi K2.6 — 3× input gap, output flips it
- GLM-5.1 vs Kimi K2.6 — the value-tier undercard
How these pages stay honest
- One data source: every rate comes from the pricing tracker, verified weekly against official rate cards, with an as-of date on every page
- When prices change, these pages change — the tracker's change log drives updates (the Opus 5 −67% repricing and Sonnet 5's Aug 31 promo deadline are both reflected everywhere they matter)
- No benchmark theater: we compare prices and structural fit, and tell you to run quality evals on your own tasks — a comparison page cannot know your workload
- The standing verdict: for most teams the answer isn't picking a winner — ClawRouters routes per-request so each pair's cheaper/better side wins call by call