Anthropic currently offers 12 Claude models across 4 generations (Claude 3 through Claude 4.6). The latest flagship is Claude Opus 4.6 — their most intelligent model, purpose-built for agents and coding. Two models (Sonnet 3.7, Opus 3) are officially deprecated but still listed for pricing. The active lineup spans from $0.25/MTok (Haiku 3) to $5/MTok input (Opus 4.6).
| Field | Value |
|---|---|
| Title | Anthropic Claude Models — Active Model Roster & Pricing |
| Source | Anthropic Official Documentation |
| Link | https://docs.anthropic.com/en/docs/about-claude/models |
| Date Published | Ongoing (docs updated continuously) |
| Date Downloaded | 2026-03-05 |
| Tags | anthropic, claude, models, pricing, AI, LLM |
Anthropic currently offers 12 Claude models across 4 generations (Claude 3 through Claude 4.6). The latest flagship is Claude Opus 4.6 — their most intelligent model, purpose-built for agents and coding. Two models (Sonnet 3.7, Opus 3) are officially deprecated but still listed for pricing. The active lineup spans from $0.25/MTok (Haiku 3) to $5/MTok input (Opus 4.6).
Anthropic's model lineup is layered by generation and by speed/intelligence tradeoff within each generation. The current recommendation is Opus 4.6 for complex tasks and Haiku 4.5 for speed-sensitive work, with Sonnet 4.6 as the balanced middle. Older models (Opus 4, 4.1, Sonnet 4, etc.) are still available and priced identically or higher than their successors — the 4.6 generation is actually cheaper per-token than the 4.0/4.1 Opus models ($5 vs $15/MTok input). New features like extended thinking, adaptive thinking, fast mode, and 1M context windows are exclusive to the latest generation.
| Model | API ID | Input $/MTok | Output $/MTok | Context | Max Output | Knowledge Cutoff | Best For |
|---|---|---|---|---|---|---|---|
| Claude Opus 4.6 | claude-opus-4-6 | $5 | $25 | 200K / 1M (beta) | 128K | May 2025 (reliable), Aug 2025 (training) | Agents, coding, complex reasoning, multi-hour research |
| Claude Sonnet 4.6 | claude-sonnet-4-6 | $3 | $15 | 200K / 1M (beta) | 64K | Aug 2025 (reliable), Jan 2026 (training) | Code gen, data analysis, agentic tool use, balanced speed+intelligence |
| Claude Opus 4.5 | claude-opus-4-5 | $5 | $25 | 200K | — | — | Previous flagship, same pricing as 4.6 |
| Claude Opus 4.1 | claude-opus-4-1 | $15 | $75 | 200K | — | — | Legacy premium tier |
| Claude Opus 4 | claude-opus-4 | $15 | $75 | 200K | — | — | Legacy premium tier |
| Claude Sonnet 4.5 | claude-sonnet-4-5 | $3 | $15 | 200K / 1M (beta) | 64K | — | Previous balanced model |
| Claude Sonnet 4 | claude-sonnet-4 | $3 | $15 | 200K / 1M (beta) | 64K | — | Earlier balanced model |
| Claude Haiku 4.5 | claude-haiku-4-5 | $1 | $5 | 200K | 64K | Feb 2025 (reliable), Jul 2025 (training) | Real-time apps, high-volume processing, sub-agents, cost-sensitive |
| Claude Haiku 3.5 | claude-haiku-3-5 | $0.80 | $4 | 200K | — | — | Budget option, still capable |
| Claude Haiku 3 | claude-haiku-3 | $0.25 | $1.25 | 200K | — | — | Cheapest option, simple tasks |
| Model | Input $/MTok | Output $/MTok |
|---|---|---|
| Claude Sonnet 3.7 | $3 | $15 |
| Claude Opus 3 | $15 | $75 |
| Need | Model | Why |
|---|---|---|
| Maximum intelligence | Opus 4.6 | Best reasoning, coding, agents |
| Speed + intelligence balance | Sonnet 4.6 | Fast, capable, great for most tasks |
| Lowest latency | Haiku 4.5 | Fastest model, near-frontier intelligence |
| Lowest cost | Haiku 3 | $0.25/MTok, good for simple tasks |
| Most recent knowledge | Sonnet 4.6 | Training data through Jan 2026 |
| Batch processing | Any model + Batch API | 50% discount on all tokens |
Anthropic's model lineup as of March 2026 reflects a mature, multi-generational portfolio. The Claude 4.6 generation (Opus and Sonnet) represents the current state of the art, with significant improvements in intelligence, coding capability, and agentic performance over prior generations.
The pricing structure reveals an interesting pattern: newer doesn't always mean more expensive. Claude Opus 4.6 costs $5/MTok input — the same as Opus 4.5 and a third of what Opus 4.0 and 4.1 cost ($15/MTok). This suggests Anthropic has achieved substantial efficiency gains in training and inference, passing those savings on while also keeping legacy models at their original price points.
The three-tier structure (Opus/Sonnet/Haiku) has remained consistent since Claude 3. Each tier targets a different optimization point: Opus for raw capability, Sonnet for the speed-intelligence sweet spot, and Haiku for throughput and cost. Within each tier, newer generations strictly dominate older ones — there's no reason to use Opus 4 over Opus 4.6 unless you have specific compatibility requirements.
Notable new capabilities exclusive to the 4.6 generation include adaptive thinking (the model dynamically adjusts reasoning depth), fast mode for Opus (2.5x speed at premium pricing), and 128K max output tokens for Opus. The 1M context window, initially introduced with earlier models, is now available on both 4.6 models.
The deprecated models (Sonnet 3.7 and Opus 3) are still accessible and priced but marked for phase-out. Developers should migrate to their respective successors.
For Sam specifically: we run on Claude Opus 4.6 (Thinking) — the top of the lineup. The 128K max output and extended thinking make it ideal for the kind of deep, multi-step work we do.