Anthropic expands Claude context window from 9K to 100K tokens
Anthropic announced a roughly 10x expansion of Claude's context window, from 9K to 100K tokens (~75,000 words), available via API. The capability enables processing of hundreds of pages of documents, full codebases, or hours of transcribed audio in under a minute. Anthropic positions this as superior to vector search for complex multi-document synthesis tasks, and partner AssemblyAI demonstrated the feature on a 58K-word podcast transcript.
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Anthropic launches Claude 2 with 100K context window and improved coding, reasoning, and safety
Anthropic released Claude 2, featuring a 100K token context window, improved performance on coding (71.2% on Codex HumanEval, up from 56.0%), math (88.0% on GSM8k), and legal reasoning (76.5% on the Bar exam multiple choice section). The model is available via API at the same price as Claude 1.3 and through a new public beta at claude.ai for US and UK users. Safety improvements include a 2x reduction in harmful outputs on internal red-team evaluations compared to Claude 1.3. Early API partners include Jasper and Sourcegraph.
Anthropic releases Claude 2.1 with 200K context window, reduced hallucinations, and tool use beta
Anthropic released Claude 2.1, featuring an industry-first 200,000-token context window (roughly 500 pages), a claimed 2x reduction in hallucination rates versus Claude 2.0, and a new beta tool-use capability allowing Claude to orchestrate across developer-defined APIs and functions. The release also introduces system prompts and a revamped developer Workbench console. Claude 2.1 is available via API and powers claude.ai for both free and Pro tiers, with the 200K context window reserved for Pro users.
Claude Opus 4.6 Released with 1M Token Context, Agentic Coding Advances, and State-of-the-Art Benchmarks
Anthropic has released Claude Opus 4.6, its most capable model to date, featuring a 1M token context window in beta, improved agentic coding and planning capabilities, and adaptive thinking with developer-controlled effort levels. The model claims top scores on Terminal-Bench 2.0, Humanity's Last Exam, GDPval-AA, and BrowseComp, outperforming OpenAI's GPT-5.2 by 144 Elo points on GDPval-AA. New product features include agent teams in Claude Code, context compaction for long-running tasks, and Claude in PowerPoint (research preview). Pricing remains unchanged at $5/$25 per million input/output tokens.
Anthropic Releases Claude Sonnet 4.6 with 1M Token Context, Improved Computer Use, and Coding Capabilities
Anthropic has released Claude Sonnet 4.6, positioned as a major upgrade over Sonnet 4.5 with improvements across coding, computer use, long-context reasoning, and agent planning. The model features a 1M token context window in beta and is now the default on claude.ai Free and Pro plans at unchanged pricing ($3/$15 per million tokens). Notably, users preferred Sonnet 4.6 over the prior Opus 4.5 frontier model 59% of the time in coding tasks, and the model shows significant gains on OSWorld computer-use benchmarks alongside improved prompt injection resistance. Safety evaluations found no major alignment concerns and rated it as safe or safer than prior Claude models.
Anthropic Releases Claude Opus 4.5 with State-of-the-Art Coding, Agent, and Computer Use Capabilities
Anthropic has released Claude Opus 4.5, positioning it as the best model in the world for coding, agentic workflows, and computer use, with pricing reduced to $5/$25 per million input/output tokens. The model demonstrates significant token efficiency gains—up to 65% fewer tokens than prior models on equivalent tasks—alongside improvements in long-horizon autonomous task execution, multi-step reasoning, and self-improving agent behavior. The release is accompanied by updates to Claude Code, the Claude Developer Platform, and integrations with Excel, Chrome, and desktop environments. Early partner feedback from GitHub Copilot, Cursor, Notion, Warp, and others reports measurable benchmark improvements and new use cases previously out of reach.
Introducing Claude 3.5 Sonnet
Anthropic launches Claude 3.5 Sonnet, the first model in its Claude 3.5 family, claiming it outperforms Claude 3 Opus and competitor models on GPQA, MMLU, and HumanEval benchmarks while operating at twice the speed and mid-tier pricing ($3/$15 per million tokens). The model features a 200K context window, improved vision capabilities, and an internal agentic coding evaluation score of 64% versus 38% for Opus. Alongside the model, Anthropic introduces Artifacts on Claude.ai, a dedicated workspace for real-time editing of AI-generated content. The model was pre-deployment evaluated by the UK AI Safety Institute and assessed at ASL-2.
Anthropic enables fine-tuning of Claude 3 Haiku via Amazon Bedrock
Anthropic announced that Claude 3 Haiku can now be fine-tuned through Amazon Bedrock using custom prompt-completion pairs, with general availability reached November 1, 2024. The capability targets specialized business workflows, with Anthropic citing a case study showing classification accuracy improvement from 81.5% to 99.6% and 85% token reduction on a content moderation task. Early enterprise adopters include SK Telecom and Thomson Reuters, both reporting measurable performance gains. Fine-tuning is available in the US West (Oregon) region with text support up to 32K context, with vision fine-tuning planned.
Anthropic releases Claude 3 Haiku, fastest and most affordable model in the Claude 3 family
Anthropic released Claude 3 Haiku, the fastest and most cost-efficient model in the Claude 3 lineup, processing 21K tokens per second for prompts under 32K tokens. The model is positioned for enterprise workloads requiring high throughput and low cost, with pricing enabling analysis of 400 Supreme Court cases or 2,500 images for one dollar. Haiku is available via the Claude API, Claude Pro on claude.ai, and Amazon Bedrock, with Google Cloud Vertex AI support forthcoming.