Anthropic
19 models built · 12 served
Anthropic is a US-based AI safety-focused company, founded in 2021, that builds the Claude family of models. Through OpenKey, 19 Anthropic models are available, spanning three tiers: Opus (flagship, highest capability), Sonnet (balanced mid-tier), and Haiku (fast, cheap). The lineup shows a clear cadence of point releases -- Opus alone spans versions 4, 4.1, 4.5, 4.6, 4.7, and 4.8, with "Fast" variants added at the 4.7 and 4.8 generations for lower-latency tradeoffs. Anthropic also ships aliased "latest" endpoints for each tier (opus-latest, sonnet-latest, haiku-latest, fable-latest) so you can pin to a tier without tracking version numbers. None of Anthropic's models are free on OpenKey -- this is a provider that competes on capability and long-context support (most current models run 1M token context) rather than free tiers.
Lineup
For general coding and agentic work, Claude Opus 4.8 ($5/M input, $25/M output) is the current flagship and ranked #1 on design_arena's androidnative benchmark. If you need lower latency and can tolerate a price jump, Opus 4.8 (Fast) runs $10/$50 per M. For everyday tasks where cost matters more than peak capability, Claude Sonnet 4.6 ($3/$15 per M) or Claude Haiku 4.5 ($1/$5 per M) cover most workloads at a fraction of Opus pricing. Claude 3 Haiku ($0.25/$1.25 per M) is the cheapest model in the lineup, useful for high-volume simple tasks. Claude Sonnet 5, the newest release, prices at $2/$10 per M with 1M context -- worth testing against Sonnet 4.6 for anything latency- or cost-sensitive.
- Claude Sonnet 5Jun 30, 2026 1M $2.06 $10.30 ctx 1M · in $2.06 · out $10.30
- Claude Fable 5Jun 9, 2026 1M $10.30 $51.50 ctx 1M · in $10.30 · out $51.50
- Claude Fable LatestJun 9, 2026 1M $10.30 $51.50 ctx 1M · in $10.30 · out $51.50
- Claude Opus 4.8May 27, 2026 1M $5.15 $25.75 ctx 1M · in $5.15 · out $25.75
- Claude Opus 4.8 (Fast)May 27, 2026 1M $10.30 $51.50 ctx 1M · in $10.30 · out $51.50
- Claude Opus 4.7 (Fast)May 12, 2026 1M $30.90 $154.50 ctx 1M · in $30.90 · out $154.50
- Anthropic Claude Haiku LatestApr 27, 2026 200K $1.03 $5.15 ctx 200K · in $1.03 · out $5.15
- Anthropic Claude Sonnet LatestApr 27, 2026 1M $2.06 $10.30 ctx 1M · in $2.06 · out $10.30
- Claude Opus LatestApr 21, 2026 1M $5.15 $25.75 ctx 1M · in $5.15 · out $25.75
- Claude Opus 4.7Apr 16, 2026 1M $5.15 $25.75 ctx 1M · in $5.15 · out $25.75
- Claude Sonnet 4.6Feb 17, 2026 1M $3.09 $15.45 ctx 1M · in $3.09 · out $15.45
- Claude Opus 4.6Feb 4, 2026 1M $5.15 $25.75 ctx 1M · in $5.15 · out $25.75
- Claude Opus 4.5Nov 24, 2025 200K $5.15 $25.75 ctx 200K · in $5.15 · out $25.75
- Claude Haiku 4.5Oct 15, 2025 200K $1.03 $5.15 ctx 200K · in $1.03 · out $5.15
- Claude Sonnet 4.5Sep 29, 2025 1M $3.09 $15.45 ctx 1M · in $3.09 · out $15.45
- Claude Opus 4.1Aug 5, 2025 200K $15.45 $77.25 ctx 200K · in $15.45 · out $77.25
- Claude Opus 4May 22, 2025 200K $15.45 $77.25 ctx 200K · in $15.45 · out $77.25
- Claude Sonnet 4May 22, 2025 1M $3.09 $15.45 ctx 1M · in $3.09 · out $15.45
- Claude 3 HaikuMar 13, 2024 200K $0.258 $1.29 ctx 200K · in $0.258 · out $1.29
Prices per 1M tokens, flat 3% fee included.
Models Anthropic serves
Beyond its own models, Anthropic hosts 12 models in the OpenKey catalog. Prices are Anthropic’s own list price per 1M input tokens, before our fee.
| Model | Built by | Context | Input /M |
|---|---|---|---|
| Claude Fable 5 | Anthropic | 1M | $10.00 |
| Claude Haiku 4.5 | Anthropic | 200K | $1.00 |
| Claude Opus 4.1 | Anthropic | 200K | $15.00 |
| Claude Opus 4.5 | Anthropic | 200K | $5.00 |
| Claude Opus 4.6 | Anthropic | 1M | $5.00 |
| Claude Opus 4.7 | Anthropic | 1M | $5.00 |
| Claude Opus 4.7 (Fast) | Anthropic | 1M | $30.00 |
| Claude Opus 4.8 | Anthropic | 1M | $5.00 |
| Claude Opus 4.8 (Fast) | Anthropic | 1M | $10.00 |
| Claude Sonnet 4.5 | Anthropic | 1M | $3.00 |
| Claude Sonnet 4.6 | Anthropic | 1M | $3.00 |
| Claude Sonnet 5 | Anthropic | 1M | $2.00 |
From the OpenRouter catalog, Jul 28, 2026. All providers
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Questions
- What's the price range for Anthropic models on OpenKey?
- Provider prices run from $0.25/$1.25 per M tokens (Claude 3 Haiku, input/output) up to $30/$150 per M (Claude Opus 4.7 Fast). On OpenKey you pay provider price plus a flat 3% fee -- so Claude 3 Haiku is $0.2575 input / $1.2875 output (0.25 x 1.03, 1.25 x 1.03), and Opus 4.7 Fast is $30.90 / $154.50 (30 x 1.03, 150 x 1.03).
- Which Anthropic model should I use if I want the cheapest option?
- Claude 3 Haiku is the cheapest Anthropic model on OpenKey at $0.25 per M input and $1.25 per M output (provider price), or $0.2575 / $1.2875 with OpenKey's 3% fee applied. It's an older model (March 2024) with 200K context and lacks the combined image-plus-file input support of newer releases, so check it handles your task before committing to it for scale.
- Are any Anthropic models free on OpenKey?
- No. Anthropic has 0 free models among its 19 listings on OpenKey, unlike some other labs on the platform (OpenKey has 25 free models total across all 52 labs, but none from Anthropic). Every Claude model -- from Haiku to Opus -- is priced per token with the standard 3% OpenKey fee added to Anthropic's list price.