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Anthropic

San Francisco, USAFounded 2021
7 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

7 models from Anthropic on Railwail

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

7 models

  • Claude Fable 5.1

    Text & ChatAnthropic
    New

    Anthropic's model for the most demanding reasoning and long-horizon agentic work. 1M-token context window, up to 128K output tokens, adaptive thinking that is always on.

    $12.00 / 1M input
    anthropicclaudefable

  • Claude Opus 4.7

    MultimodalAnthropic
    New

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

    $6.00 / 1M input
    anthropicflagshipreasoning

  • Claude Opus 4.8

    Text & ChatAnthropic
    New

    The most capable model of Anthropic's Opus 4 series. State of the art on long-horizon agentic work, coding and knowledge tasks, with a 1M-token context window at standard pricing.

    $6.00 / 1M input
    anthropicclaudeopus

  • Claude Opus 5.5

    Text & ChatAnthropic
    New

    Anthropic's current Opus model for long-running agentic coding and knowledge work. 1M-token context window, up to 128K output tokens, adaptive thinking that is always on.

    $4.80 / 1M input
    anthropicclaudeopus

  • Claude Sonnet 4.6

    MultimodalAnthropic
    New

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

    $3.60 / 1M input
    anthropicbalancedproduction

  • Claude Sonnet 5

    Text & ChatAnthropic
    New

    Anthropic's Sonnet model with the best combination of speed and intelligence. 1M-token context window, up to 128K output tokens, adaptive thinking.

    $2.40 / 1M input
    anthropicclaudesonnet

  • 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.

    $1.20 / 1M input
    anthropiccost-efficientlow-latency

Currently unavailable (4)

Listed for reference. These models have no verified price or are no longer served, so the API does not run them.

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?
Accounts created with Google get 10 trial credits ($0.10), usable 24 hours after sign-up for runs of up to 2 credits each, so you can test the cheaper Anthropic models. Email and GitHub sign-ups start without trial credits. No credit card is required to sign up.
Categories Anthropic works in
textcodemultimodal

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