Claude API
Hosted API for the Claude models, billed per token.
Find alternatives to Claude API
What it does
- Text generation
- Code generation
- Document extraction
How it compares
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OpenAI API
Rivals on three sourced fronts — consumer assistants, enterprise model APIs and coding agents; in mid-2025 enterprise LLM usage, Anthropic's 32% led OpenAI's 25%.
Anthropic now holds 32% of the enterprise large language model market share by usage, according to a report from Menlo Ventures released on Thursday. OpenAI holds the second-largest market share by usage among enterprises, with 25%.
News reporting · 25 Aug 2026 -
Gemini Enterprise Agent Platform (formerly Vertex AI)
One measured enterprise-LLM market: Anthropic's usage share reached 40% at end-2025 while Google's held near 21% — and Vertex is Google's cloud-platform route to that market, against Anthropic's direct API.
Anthropic holds a dominant lead over its AI rivals when it comes to enterprise large language model usage. The AI research lab holds a 40% market share, according to a December report from VC firm Menlo Ventures (which, it should be noted, has invested aggressively in Anthropic). In July, the startup’s market share was estimated to be 32%. Google’s Gemini adoption has been steadier, according to Menlo Ventures. The company released its enterprise product last fall and has seen its enterprise LLM usage market share largely stay the same, per Menlo’s findings, growing from 20% in July to 21% at the end of the year. OpenAI on the other hand has seen its usage market share drop from 50% in 2023 to 27% at the end of 2025 — a trend that appears to concern the company.
News reporting · 25 Aug 2026 -
Cohere Platform
Both sell enterprise LLM APIs in the market Menlo measures; Anthropic earns 40% of spend while Cohere shares the 12% tail with Mistral and Meta's Llama — the leader against the long tail.
We estimate Anthropic now earns 40% of enterprise LLM spend, up from 24% last year and 12% in 2023. Over the same period, OpenAI lost nearly half of its enterprise share, falling to 27% from 50% in 2023. Google also saw significant gains, increasing its enterprise share from 7% in 2023 to 21% in 2025. Together, these three companies account for 88% of enterprise LLM API usage, with the remaining 12% spread across Meta’s Llama, Cohere, Mistral, and a long tail of smaller providers.
Research report · 25 Aug 2026 -
Mistral AI Studio
Both sell enterprise LLM APIs in the market Menlo measures; Anthropic's 40% of spend against Mistral's slice of the 12% tail it shares with Cohere and Meta's Llama.
We estimate Anthropic now earns 40% of enterprise LLM spend, up from 24% last year and 12% in 2023. Over the same period, OpenAI lost nearly half of its enterprise share, falling to 27% from 50% in 2023. Google also saw significant gains, increasing its enterprise share from 7% in 2023 to 21% in 2025. Together, these three companies account for 88% of enterprise LLM API usage, with the remaining 12% spread across Meta’s Llama, Cohere, Mistral, and a long tail of smaller providers.
Research report · 25 Aug 2026 -
Claude
Claude Platform | Claude by Anthropic
Official documentation · 5 Sep 2026 -
Inference Providers
Anthropic competes with Hugging Face in enterprise LLM usage, but differs in strategy
Research report · 19 Sep 2026 -
xAI API
Can I use the OpenAI or Anthropic SDK with Grok? Yes. Point your existing SDK at base URL https://api.x.ai/v1 with your SpaceXAI API key.
Official documentation · 19 Sep 2026 -
You.com Web Search API
NEW Highlights mode for Web Search: Top score on SimpleQA (95.17%) at the same $5 CPM; 35% cheaper than Claude's built-in web search.
Official documentation · 19 Sep 2026
Sources
- Pricing
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Official documentation · 2 Sep 2026
Verified 2026-09-02: URL 200, function unchanged; page H1 now brands as Claude Platform.
- Constraints
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Official documentation · 29 Sep 2026
Derived from this product's security block by scripts/fixes/derive-constraints-met.py; see provenance.security.
- Security
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Official documentation · 29 Sep 2026
Retention, BAA and ZDR (by arrangement; not every endpoint or model) from the API retention doc; certifications from support.claude.com's certifications article, which names the Anthropic API; training from privacy.claude.com; the workspace geo is US only (data-residency doc). SSO needs a Console org linked to a parent organization.
- Sold within
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The API is its own tab on Anthropic's pricing page, priced per token rather than per seat, and bought without any Claude plan.
- Interfaces
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Official documentation · 28 Sep 2026
Page centers on the Messages API and links to CLI, SDKs and libraries for building with Claude.
Also from Anthropic
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Claude Agent SDK Developer tool
Python and TypeScript library that runs the same agent loop, tools and context management that power Claude Code, so developers can embed the loop in their own process rather than calling the API directly.
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Claude Science Application
Desktop application for scientific research that runs analyses, searches scientific databases and traces work from data wrangling through to publication.
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Claude Security Application
Application that scans codebases for high-severity vulnerabilities, validates findings by adversarial verification and recommends patches for review, with a companion Claude Code plugin.
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Claude Cowork AI agent
Agentic task app in which Claude works asynchronously across a user's files and tools toward a stated goal, checked in on from desktop, web or phone.
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Claude Managed Agents Agent platform
Hosted API offering a pre-built configurable agent harness with managed sandboxes and persistent sessions for long-running asynchronous agent tasks, billed separately from token usage.
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Claude Application
Assistant for chat, document analysis and coding, used in the browser and in desktop and mobile apps.
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Claude Code AI agent
Coding agent that works on a codebase from the terminal, an IDE extension and a desktop app.
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Claude for Microsoft 365 Application
Claude working inside Excel, PowerPoint, Word and Outlook with context carried across the documents — preserving templates and house styles and showing every edit as tracked changes, highlighted cells or draft emails.
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Claude for Slack Application
Claude tagged as @Claude inside Slack threads and channels: it reads thread context and replies in real time, analyses conversations, pulls data, drafts content, monitors channels, triages alerts and runs standing instructions without leaving Slack.
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Claude in Chrome AI agent
Browser extension that lets Claude act inside Chrome on the user's behalf — reading pages, clicking, typing and filling forms to work through multi-step web tasks without approving each step, with the user keeping control of what it may do.
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Claude Design Application
Lets users collaborate with Claude to create on-brand visual work (decks, prototypes, wireframes, marketing collateral) with design-system import and Claude Code integration via /design-sync.
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