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Anthropic

San Francisco, USAFounded 2021
6 models

Anthropic builds the Claude family of models (Opus, Sonnet, Haiku) with a focus on AI safety, constitutional training, and long-context reasoning.

Visit Anthropic docsWebsiteGitHub

6 models from Anthropic on Railwail

Access every Anthropic model through Railwail's OpenAI-compatible API.

6 models available

Claude Opus 4

Text & ChatAnthropic
NewPopular

Anthropic's most powerful model. Exceptional at complex analysis, agentic tasks, and extended reasoning.

Free5.0s
flagshipreasoningagentic

Claude Opus 4.7

MultimodalAnthropic
NewPopular

Anthropic's April 2026 flagship. 87.6% on SWE-bench Verified, 3x higher image resolution, output self-verification, vision + reasoning.

Free
anthropicflagshipreasoning

Claude Sonnet 4

Text & ChatAnthropic
Popular

Anthropic's most capable model. Excellent for complex analysis, coding, math, and creative writing.

Free3.0s
popularcodinganalysis

Claude Sonnet 4.6

MultimodalAnthropic
NewPopular

Anthropic's balanced mid-tier model from February 2026. Best price/performance for production workloads: 5x cheaper than Opus, near-flagship quality.

Free
anthropicbalancedproduction

Claude Haiku 3.5

Text & ChatAnthropic

Anthropic's fast and affordable model. Great for quick tasks, summarization, and simple coding.

Free1.0s
fastaffordable

Claude Haiku 4.5

MultimodalAnthropic
New

Anthropic's fastest and cheapest 4.x model. Strong vision and tool use at ultra-low latency, ideal for high-concurrency workloads.

Free
anthropiccost-efficientlow-latency

Frequently asked questions

How is Anthropic pricing handled on Railwail?
Railwail uses transparent per-call or per-token credit pricing for all Anthropic models. You pay only for what you use — no monthly minimums, no upfront commitments. Pricing for every individual Anthropic model is shown on its detail page.
Are there rate limits when using Anthropic via Railwail?
Default rate limits depend on your account tier and the underlying Anthropic capacity. Free-tier accounts get sensible defaults for development; paid accounts can request higher limits. Contact support if you need dedicated throughput or burst capacity.
Which regions does Anthropic support through Railwail?
Anthropic models are served from Railwail's globally distributed edge infrastructure. EU, US, and Asia-Pacific traffic is automatically routed to the nearest available provider region. GDPR-compliant EU-only routing is available on request.
Is there a sandbox or free tier to test Anthropic models?
Yes — every new Railwail account receives free credits that work across all providers, including Anthropic. No credit card is required to start. You can try every model in the catalog before committing to a paid plan.
Categories Anthropic works in
textcodemultimodal

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