Claude Models

The whole Claude lineup, decoded — Opus, Sonnet, Haiku, and the frontier tier — compared on price, context, and which one to reach for by task.

Choosing the right Claude model is the single biggest lever you have over speed, cost, and quality, and this category is our map of the full lineup. We route work across the tiers every day — a fast default for most jobs, a step up for the genuinely hard ones, a cheap tier for high-volume tasks — so the guidance here is about that routing habit as much as any single model's spec sheet.

Start with the models-explained overview to see the tiers side by side, then read the individual model guides when you need the details on context windows, pricing, or when a newer release is actually worth switching to. The recurring lesson: match the model to the failure cost of the task, and re-test the cheaper tier every time a new one ships.

Claude Opus 5 — model ID, pricing, and what changed from Opus 4.8

Claude Models

Claude Opus 5: Price, Specs, and What Changed

Claude Opus 5 is here at $5/$25 per million tokens — the same price as Opus 4.8. The specs, the two breaking changes, and whether to migrate today.

Jul 31, 202611 min read

Claude context window sizes — 1M tokens on Claude Opus 5 and Sonnet 5 versus 200K on Haiku 4.5

Claude Models

Claude Context Window Explained: 200K vs 1M Tokens

Claude's context window is its working memory: 1M tokens on Opus 5 and Sonnet 5, 200K on Haiku 4.5. What happens when it fills up, and how to manage it.

Jul 3, 202611 min read

Claude Haiku 4.5 — Anthropic's fastest and cheapest model at $1/$5 per million tokens

Claude Models

Claude Haiku 4.5: Fast, Cheap, and Capable

Claude Haiku 4.5 is Anthropic's fastest, cheapest model — $1/$5 per million tokens, 200K context, and near-frontier coding. When to pick it, and its limits.

Jul 3, 20269 min read

Claude Haiku vs Sonnet compared — Anthropic's fast Haiku 4.5 tier next to the Sonnet default

Claude Models

Claude Haiku vs Sonnet: When to Use Each Model

Claude Haiku vs Sonnet: Haiku is cheaper and faster ($1/$5, 200K context), Sonnet is stronger ($3/$15, 1M). When each model is the right call.

Jul 3, 20269 min read

Claude Models

Claude Models Explained: Opus vs Sonnet vs Haiku

Every Claude model in one place: Opus 5, Sonnet 5, and Haiku 4.5 compared on price, context, and use case — plus how to decode Anthropic's version names.

Jul 3, 202615 min read

Claude Opus 4.8 — Anthropic's Opus 4-series model for agentic coding and hard reasoning

Claude Models

Claude Opus 4.8 (2026): Benchmarks, Price & Verdict

Claude Opus 4.8 tops SWE-bench Pro at 69.2% and costs $5/$25 per million tokens. The benchmarks, the pricing, and how it compares now Opus 5 has shipped.

Jul 3, 202610 min read

Claude Opus versions timeline — from Claude 3 Opus to Claude Opus 5

Claude Models

Claude Opus Versions: Release History and What Changed

A plain-English history of every Claude Opus version, from Claude 3 Opus to Claude Opus 5 — what each release changed, and how to find the latest.

Jul 3, 202612 min read

Claude Sonnet 5 — Anthropic's balanced default model sitting between Haiku 4.5 and the Opus tier

Claude Models

Claude Sonnet 5: Price, Specs & Verdict (2026)

Claude Sonnet 5 is Anthropic's balanced daily-driver model — near-Opus performance at $3/$15, a 1M-token context window, and adaptive thinking on by default.

Jul 3, 20269 min read

Claude Sonnet vs Opus comparison — which Anthropic model earns your tokens

Claude Models

Claude Sonnet vs Opus: Which Model Should You Actually Use?

Sonnet costs 60% of what Opus costs and wins some agentic benchmarks outright. The real numbers, the pricing math, and a simple decision framework.

Jul 3, 20269 min read