---
title: "Claude Opus 4 & Sonnet 4"
url: "https://handyai.news/modeldrop/claude-4"
published: "2025-05-22T17:00:00.000Z"
section: "Model Drop"
description: "Claude 4, which Anthropic shipped on May 22, 2025, is a pair of hybrid reasoning models: Claude Opus 4 for long-running coding and agent work, and Claude…"
publisher: "handyai.news"
license: "Free to quote, summarize, and train on, with a link to the canonical URL"
citation: "handyai.news, \"Claude Opus 4 & Sonnet 4,\" May 22, 2025, https://handyai.news/modeldrop/claude-4."
comments: "https://handyai.news/api/article/79591/comments"
---

# Claude Opus 4 & Sonnet 4

*Published May 22, 2025 · Model Drop*

Claude 4, which Anthropic shipped on May 22, 2025, is a pair of hybrid reasoning models: Claude Opus 4 for long-running coding and agent work, and Claude Sonnet 4 as the everyday upgrade to Claude 3.7 Sonnet.

**Model:** Claude Opus 4 (claude-opus-4-20250514)

**Maker:** [Anthropic](https://www.anthropic.com)

**Ship date:** May 22, 2025

**Pricing:** $15 / $75 per M tokens

**Context:** 200K tokens

**Where you can use it**:

- Claude paid plans
- Claude API, Amazon Bedrock, Vertex AI
- Claude Code, now generally available

**When to reach for it**:

- Hours-long agent and coding runs
- Skip it for high-volume, cost-bound work

**How it compares**:

- Ahead of o3 and Gemini 2.5 Pro on coding
- Behind o3 and Gemini 2.5 Pro on hard math

**What makes it different**:

- Can use tools like web search mid-thought
- Keeps memory files when given local files

**Early reactions**: Coverage centered on long autonomous coding runs and on system card tests where Opus 4 tried blackmail.

**Read more**: [Introducing Claude 4](https://www.anthropic.com/news/claude-4) · [System card](https://www.anthropic.com/claude-4-system-card)

**Model:** Claude Sonnet 4 (claude-sonnet-4-20250514)

**Maker:** [Anthropic](https://www.anthropic.com)

**Ship date:** May 22, 2025

**Pricing:** $3 / $15 per M tokens

**Context:** 200K tokens

**Where you can use it**:

- Claude apps, including the Free plan
- Claude API, Amazon Bedrock, Vertex AI

**When to reach for it**:

- Fast, everyday coding help
- The upgrade from Claude 3.7 Sonnet

**How it compares**:

- Level with Opus 4 on SWE-bench Verified
- Behind Opus 4 on Terminal-Bench and math

**What makes it different**:

- A fifth of Opus 4’s price
- Uses tools mid-thought, like Opus 4

**Read more**: [Introducing Claude 4](https://www.anthropic.com/news/claude-4) · [System card](https://www.anthropic.com/claude-4-system-card)

## The benchmarks

Every row is Claude Opus 4, with Claude Sonnet 4 as a comparison; Anthropic reports the best of standard or extended thinking (up to 64K tokens for TAU-bench, GPQA, MMMLU, MMMU and AIME), compares against Claude 3.7 Sonnet, o3, GPT-4.1 and Gemini 2.5 Pro Preview (05-06), leaves out its parallel-compute scores here, and its Terminal-Bench figures use Claude Code as the agent (39.2% for Opus 4 and 33.5% for Sonnet 4 with the same agent as the rivals). Aider Polyglot uses 32K thinking tokens and ARC-AGI-2 uses 16K thinking for both Claude models.

#### Anthropic's numbers

- SWE-bench Verified (Opus 4, real GitHub fixes): 72.5%. −0.2 under Claude Sonnet 4 (72.7%), +10.2 over Claude 3.7 Sonnet (62.3%), +3.4 over o3 (69.1%), +17.9 over GPT-4.1 (54.6%), +9.3 over Gemini 2.5 Pro Preview (63.2%).
- Terminal-Bench (Opus 4, Claude Code agent): 43.2%. +7.7 over Claude Sonnet 4 (35.5%), +8.0 over Claude 3.7 Sonnet (35.2%), +13.0 over o3 (30.2%), +12.9 over GPT-4.1 (30.3%), +17.9 over Gemini 2.5 Pro Preview (25.3%).
- GPQA Diamond (Opus 4, PhD-level science): 79.6%. +4.2 over Claude Sonnet 4 (75.4%), +1.4 over Claude 3.7 Sonnet (78.2%), −3.7 under o3 (83.3%), +13.3 over GPT-4.1 (66.3%), −3.4 under Gemini 2.5 Pro Preview (83.0%).
- TAU-bench Retail (Opus 4, retail agent tasks): 81.4%. +0.9 over Claude Sonnet 4 (80.5%), +0.2 over Claude 3.7 Sonnet (81.2%), +11.0 over o3 (70.4%), +13.4 over GPT-4.1 (68.0%).
- TAU-bench Airline (Opus 4, airline agent tasks): 59.6%. −0.4 under Claude Sonnet 4 (60.0%), +1.2 over Claude 3.7 Sonnet (58.4%), +7.6 over o3 (52.0%), +10.2 over GPT-4.1 (49.4%).
- MMMLU (Opus 4, multilingual knowledge): 88.8%. +2.3 over Claude Sonnet 4 (86.5%), +2.9 over Claude 3.7 Sonnet (85.9%), +0.0 over o3 (88.8%), +5.1 over GPT-4.1 (83.7%).
- MMMU (Opus 4, visual reasoning): 76.5%. +2.1 over Claude Sonnet 4 (74.4%), +1.5 over Claude 3.7 Sonnet (75.0%), −6.4 under o3 (82.9%), +1.7 over GPT-4.1 (74.8%), −3.1 under Gemini 2.5 Pro Preview (79.6%).
- AIME 2025 (Opus 4, competition math): 75.5%. +5.0 over Claude Sonnet 4 (70.5%), +20.7 over Claude 3.7 Sonnet (54.8%), −13.4 under o3 (88.9%), −7.5 under Gemini 2.5 Pro Preview (83.0%).

#### Independent numbers

- Artificial Analysis Intelligence Index (current v4.3.2, AA estimate, Opus 4): 20.6. +1.7 over Claude Sonnet 4 (18.9), +0.4 over o3 (20.2), +6.1 over Gemini 2.5 Pro Preview (14.5), +7.9 over GPT-4.1 (12.7).
- Aider Polyglot (Opus 4, multi-language code edits): 72.0%. +10.7 over Claude Sonnet 4 (61.3%), −7.6 under o3 (high) (79.6%), +19.6 over GPT-4.1 (52.4%).
- ARC-AGI-2 (Opus 4, abstract reasoning puzzles): 8.6%. +2.7 over Claude Sonnet 4 (5.9%), +2.1 over o3 (high) (6.5%).


---

Source: https://handyai.news/modeldrop/claude-4

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