Anthropic Claude API: models and pricing

FastMetal serves 10 Anthropic Claude models through one OpenAI-compatible API key, billed per token from a prepaid balance. Change the base URL and key, and existing code calls them as is. The list also shows Anthropic Claude models we do not serve yet.

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22 models

Claude Sonnet 5.5

anthropic-claude-sonnet-5-5

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...

Provider:anthropic logoanthropic
Pricing:$2.11 in · $10.55 out / 1M tokens
Context:1.0M tokens

Claude Opus 5.5

anthropic-claude-opus-5-5

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

Provider:anthropic logoanthropic
Pricing:$4.22 in · $21.10 out / 1M tokens
Context:1.0M tokens

Claude Fable 5.1

anthropic-claude-fable-5-1

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

Provider:anthropic logoanthropic
Pricing:$10.55 in · $52.75 out / 1M tokens
Context:1.0M tokens

Claude Opus 5

anthropic-claude-opus-5

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...

Provider:anthropic logoanthropic
Pricing:$5.28 in · $26.38 out / 1M tokens
Context:1.0M tokens

Claude Sonnet 5

anthropic-claude-sonnet-5

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...

Provider:anthropic logoanthropic
Pricing:$2.11 in · $10.55 out / 1M tokens
Context:1.0M tokens

Claude Fable 5

anthropic-claude-fable-5

Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...

Provider:anthropic logoanthropic
Pricing:$10.55 in · $52.75 out / 1M tokens
Context:1.0M tokens

Claude Opus 4.8

anthropic-claude-opus-4-8

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...

Provider:anthropic logoanthropic
Pricing:$5.28 in · $26.38 out / 1M tokens
Context:1.0M tokens
Text Overall
#37

Claude Opus 4.8 (Fast)

anthropic/claude-opus-4.8-fast

Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8.

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:1.0M tokens

Claude Opus 4.7 (Fast)

anthropic/claude-opus-4.7-fast

Fast-mode variant of [Opus 4.7](/anthropic/claude-opus-4.7) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:1.0M tokens

Claude Opus 4.7

anthropic-claude-opus-4-7

Opus 4.7 is the next generation of Anthropic's Opus family, built for long-running, asynchronous agents. Building on the coding and agentic strengths of Opus 4.6, it delivers stronger performance on...

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:1.0M tokens
Text Overall
#10

Claude Sonnet 4.6

anthropic-claude-sonnet-4-6

Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work.

Provider:anthropic logoanthropic
Pricing:$3.49 in · $17.41 out / 1M tokens
Context:1.0M tokens
Text Overall
#43

Claude Opus 4.6

anthropic-claude-opus-4-6

Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks. It is built for agents that operate across entire workflows rather than single prompts, making it especially effective for large codebases, complex refa…

Provider:anthropic logoanthropic
Pricing:$5.42 in · $26.77 out / 1M tokens
Context:1.0M tokens
Text Overall
#7

Claude Opus 4.5

anthropic/claude-opus-4.5

Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use.

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:200K tokens
Text Overall
#47

Claude Haiku 4.5

anthropic-claude-haiku-4-5

Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models.

Provider:anthropic logoanthropic
Pricing:$1.17 in · $5.81 out / 1M tokens
Context:200K tokens
Text Overall
#142

Claude Sonnet 4.5

anthropic/claude-sonnet-4.5

Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows.

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:1.0M tokens
Text Overall
#70

Claude Opus 4.1

anthropic/claude-opus-4.1

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks.

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:200K tokens
Text Overall
#82

Claude Opus 4

anthropic/claude-opus-4

Claude Opus 4 is benchmarked as the world’s best coding model, at time of release, bringing sustained performance on complex, long-running tasks and agent workflows.

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:200K tokens
Text Overall
#140

Claude Sonnet 4

anthropic/claude-sonnet-4

Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability.

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:1.0M tokens
Text Overall
#173

Claude 3.7 Sonnet

anthropic/claude-3.7-sonnet

Claude 3.7 Sonnet is an advanced large language model with improved reasoning, coding, and problem-solving capabilities. It introduces a hybrid reasoning approach, allowing users to choose between rapid responses and extended, step-by-step…

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:200K tokens
Text Overall
#194

Claude 3.5 Haiku

anthropic/claude-3.5-haiku

Claude 3.5 Haiku features offers enhanced capabilities in speed, coding accuracy, and tool use. Engineered to excel in real-time applications, it delivers quick response times that are essential for dynamic tasks such as chat interactions a…

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:200K tokens
Text Overall
#249

Claude 3.5 Sonnet

anthropic/claude-3.5-sonnet

New Claude 3.5 Sonnet delivers better-than-Opus capabilities, faster-than-Sonnet speeds, at the same Sonnet prices. Sonnet is particularly good at: - Coding: Scores ~49% on SWE-Bench Verified, higher than the last best score, and without an…

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:200K tokens
Text Overall
#191

Claude 3 Haiku

anthropic/claude-3-haiku

Claude 3 Haiku is Anthropic's fastest and most compact model for near-instant responsiveness. Quick and accurate targeted performance.

Provider:anthropic logoanthropic
Pricing:Not on FastMetal yet
Context:200K tokens
Text Overall
#314