> ## Documentation Index
> Fetch the complete documentation index at: https://docs.radium.cloud/llms.txt
> Use this file to discover all available pages before exploring further.

# Models overview

> Compare Radium's three inference tiers

# Models overview

Radium serves three tuned model tiers through OpenAI- and Anthropic-compatible endpoints. The tiers map directly to the frontier model families you already know.

## Comparison

| | Hal 1.0 | Clarke 1.0 | Tycho 1.0 |
| - | - | - | - |
| **Class** | Opus-class | Sonnet-class | Haiku-class |
| **Best for** | Complex reasoning, multi-step agents, deep code analysis | RAG, copilots, code assistance, structured outputs | Classification, extraction, summarization, routing |
| **Context window** | 250,000 tokens | 1,000,000 tokens | 125,000 tokens |

Hal 1.0 is for reasoning: agents that decompose problems, generate structured plans, or write long programs. Use it when the task pays for quality. Clarke 1.0 is the default for most workloads: RAG, copilots, tool calls and any system where latency and cost matter. Tycho 1.0 is for high-volume automation: classification, entity extraction, summarization, routing. Send a request to Tycho when you would have used a classifier model or a rules engine.

## Frontier model mapping

Use this table to choose the Radium tier that replaces the frontier model you are switching from.

| Provider | Frontier model | Radium equivalent | Best for |
| - | - | - | - |
| OpenAI | `gpt-4o` | `clarke-1.0` | General-purpose, RAG, copilots |
| OpenAI | `o1` / `o1-mini` | `hal-1.0` | Complex reasoning, multi-step agents |
| OpenAI | `gpt-4o-mini` | `tycho-1.0` | Fast, cheap classification and extraction |
| Anthropic | `claude-3-5-sonnet-20241022` | `clarke-1.0` | General-purpose, RAG, copilots |
| Anthropic | `claude-3-opus-20240229` | `hal-1.0` | Complex reasoning, deep code analysis |
| Anthropic | `claude-3-5-haiku-20241022` | `tycho-1.0` | Fast, cheap classification and extraction |

## Capabilities matrix

| Capability | Hal 1.0 | Clarke 1.0 | Tycho 1.0 |
| - | - | - | - |
| Streaming | Supported | Supported | Supported |
| Tool calling | Supported | Supported | Supported |
| JSON mode | Supported | Supported | Supported |
| JSON schema | Supported | Supported | Supported |
| Reasoning | Supported | Supported | Not supported |
| Vision input | Supported | Supported | Not supported |


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