Reasoning Model

Claude 3.5 Sonnet

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Mid-tier Claude model with 200K context for coding and agentic workflows

Claude 3.5 Sonnet (launched Aug 28, 2025) is Anthropic's flagship mid-tier model with a 200K context window, strong coding and vision performance, and pay-per-use pricing at $3 per 1M input tokens and $15 per 1M output tokens. It is available via Claude.ai, the Claude iOS app, the Anthropic API, Amazon Bedrock, and Google Vertex AI, supports tool use/function calling, and powers agentic workflows, RAG, and coding assistants.

Claude 4.5 Haiku

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Fast Claude 4.5 model with 200K context at $1/$5 per MTok

Claude 4.5 Haiku (released Oct 15, 2025) is Anthropic's fastest Claude 4.5 model with near-Sonnet 4 performance at one-third the cost. It supports a 200K token context window, extended thinking, context awareness, and full tool use (code execution, computer use, bash, text editor, web search). It is available on Claude.ai (web, iOS, Android), the Claude Developer Platform/API, Claude Code, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry with $1/$5 per million input/output token pricing.

Claude Opus 4.5

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Hybrid reasoning model for coding, agents, and computer use with a 200K context window

Claude Opus 4.5 (released Nov 24, 2025) is Anthropic's frontier model for complex coding, agentic workflows, and computer-use tasks. It offers a 200K token context window, supports tool use/function calling, and is available in Claude Pro/Max/Team/Enterprise as well as the Claude API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry. Pricing starts at $5 per 1M input tokens and $25 per 1M output tokens, with prompt caching and batch options for additional savings.

GPT-5

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OpenAI reasoning model with 400K context and text+image inputs

GPT-5 is OpenAI’s previous-generation reasoning model for coding and agentic tasks. It supports text and image inputs with up to 128K output tokens inside a 400K context window, runs across the Chat Completions, Responses, Realtime, and Assistants APIs, and supports tools like web search, file search, image generation, and code interpreter (no computer-use). OpenAI recommends GPT-5.1 for the newest capabilities, but GPT-5 remains available for production workloads.