Fall 2025: a season of major launches
Before the arrival of Claude Opus 4.5, Anthropic kept up a stream of announcements throughout fall 2025. A look back at the key moments of this intense period.
Claude Sonnet 4.5 โ The code king
September 29, 2025 โ Anthropic launches Claude Sonnet 4.5, presented as โthe best coding model in the world.โ
Key performance
| Benchmark | Score |
|---|---|
| SWE-bench Verified | 77.2% |
| OSWorld (computer use) | 61.4% |
Features
- Complex agents โ Maintaining focus for 30+ hours
- Computer Use โ Leader on computer-use benchmarks
- Reasoning โ Substantial gains in math and logic
Pricing
| Type | Price |
|---|---|
| Input | $3 / million tokens |
| Output | $15 / million tokens |
Associated product updates
- Claude Code โ Checkpoints and rollback
- VS Code โ Native extension
- Claude for Chrome โ Available for Max users
- Claude Agent SDK โ Developer toolkit for building agents
Introducing Claude Sonnet 4.5โthe best coding model in the world. โ @claudeai on X
Claude Haiku 4.5 โ Speed and efficiency
October 15, 2025 โ Launch of Claude Haiku 4.5, Anthropicโs compact model.
Best value for money
| Metric | Value |
|---|---|
| SWE-bench Verified | 73.3% |
| Speed | 2-4.5x faster than Sonnet 4.5 |
| Cost | 1/3 the price of Sonnet |
Pricing
| Type | Price |
|---|---|
| Input | $1 / million tokens |
| Output | $5 / million tokens |
Optimal use cases
- Real-time, low-latency applications
- Chat assistants and customer service
- Pair programming and rapid prototyping
- Multi-agent orchestration with Sonnet 4.5
- Computer vision applications
Microsoft partnerships
November 18, 2025 โ Triple announcement with Microsoft.
Claude in Microsoft Foundry
Claude models are now available in Microsoft Azure AI Foundry, giving businesses easier access through the Microsoft ecosystem.
Claude in Microsoft 365 Copilot
Integration of Claude directly into Microsoft productivity tools used daily by hundreds of millions of people.
Strategic partnership with NVIDIA
Microsoft-NVIDIA-Anthropic three-way collaboration to accelerate AI infrastructure.
Claude Desktop
October 21, 2025 โ General availability of Claude Desktop.
Claude Desktop is now generally available. New on Mac: Capture screenshots, click windows to share context, and press Caps Lock to talk to Claude aloud. โ @claudeai on X
New Mac features
- Screenshot capture โ Visual context sharing
- Click on windows โ Context selection by pointing and clicking
- Voice command โ Caps Lock to speak to Claude
- Parallel sessions โ Local and remote
Guide: Using CLAUDE.md Files
November 25, 2025 โ The Claude blog publishes a guide on customizing Claude Code via CLAUDE.md files.
Concept
A CLAUDE.md file at the root of the repo provides persistent context to Claude Code:
- Project architecture
- Code standards
- Team workflows
- Build/test commands
Key points
| Feature | Description |
|---|---|
/init | Automatically generates a CLAUDE.md |
| Custom commands | Create commands in .claude/commands/ |
| Subagents | Isolate context by work phase |
| MCP servers | Document Model Context Protocol integrations |
Other notable announcements
Geographic expansions
| Date | Announcement |
|---|---|
| Oct 7 | Office in India (2nd in Asia-Pacific) |
| Oct 23 | Office in Seoul (3rd in Asia-Pacific) |
| Oct 29 | Office in Tokyo + MoU with Japan AI Safety Institute |
| Nov 7 | Offices in Paris and Munich |
Enterprise partnerships
| Date | Partner | Detail |
|---|---|---|
| Oct 6 | Deloitte | 470,000 people with access to Claude |
| Oct 14 | Salesforce | Expansion to regulated industries |
| Nov 4 | Cognizant | 350,000 employees with access |
Sector programs
- Oct 20 โ Claude for Life Sciences
- Oct 27 โ Claude for Financial Services
1 million tokens
August 12, 2025 โ Claude Sonnet 4 now supports 1 million tokens of context.
Process over 75,000 lines of code or hundreds of documents in a single request. โ @claudeai on X
Visual timeline
Aoรปt 2025
โโโ 12 - Sonnet 4 : 1M tokens de contexte
Septembre 2025
โโโ 15 - Claude dans Xcode
โโโ 29 - Claude Sonnet 4.5
Octobre 2025
โโโ 6 - Partenariat Deloitte
โโโ 7 - Bureau Inde + CTO Rahul Patil
โโโ 14 - Extension Salesforce
โโโ 15 - Claude Haiku 4.5
โโโ 20 - Claude for Life Sciences
โโโ 21 - Claude Desktop GA
โโโ 23 - Bureau Sรฉoul + Google Cloud TPUs
โโโ 27 - Claude for Financial Services
โโโ 29 - Bureau Tokyo
Novembre 2025
โโโ 4 - Cognizant + Islande education pilot
โโโ 7 - Bureaux Paris & Munich
โโโ 12 - $50B infrastructure USA
โโโ 13 - Maryland + AI espionage disruption
โโโ 18 - Microsoft Foundry & 365 Copilot
โโโ 24 - Claude Opus 4.5
โโโ 25 - Guide CLAUDE.md filesKey takeaways
Fall 2025 laid the foundations for Anthropicโs dominance:
- Models โ Sonnet 4.5 and Haiku 4.5 cover every use case
- Distribution โ Microsoft, Salesforce, Deloitte = massive access
- International โ Physical presence on 3 continents
- Products โ Claude Desktop and Claude Code are mature
All of this sets the stage for Opus 4.5 on November 24.
Sources
This document was translated from the fr version into the en language using the gpt-5.4-mini model. For more information about the translation process, see https://gitlab.com/jls42/ai-powered-markdown-translator