Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding…
Model details →Anthropic: Claude Opus 4.5 (batch) vs MoonshotAI: Kimi K2 0905
MoonshotAI: Kimi K2 0905 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Kimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Opus 4.5 (batch) | MoonshotAI: Kimi K2 0905 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 262K | 🏆 MoonshotAI: Kimi K2 0905 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.50 | $0.60 | 🏆 MoonshotAI: Kimi K2 0905 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.50 | $2.50 | 🏆 MoonshotAI: Kimi K2 0905 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | — | 🏆 Anthropic: Claude Opus 4.5 (batch) |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | — | 🏆 Anthropic: Claude Opus 4.5 (batch) |
Frequently asked questions
Is Anthropic: Claude Opus 4.5 (batch) better than MoonshotAI: Kimi K2 0905?
MoonshotAI: Kimi K2 0905 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Opus 4.5 (batch) and MoonshotAI: Kimi K2 0905?
Input: $2.50 vs $0.60 per 1M tokens. Output: $12.50 vs $2.50 per 1M tokens.
What context windows do Anthropic: Claude Opus 4.5 (batch) and MoonshotAI: Kimi K2 0905 support?
Anthropic: Claude Opus 4.5 (batch) supports up to 200K tokens. MoonshotAI: Kimi K2 0905 supports up to 262K tokens.
Do both Anthropic: Claude Opus 4.5 (batch) and MoonshotAI: Kimi K2 0905 support tool calling?
Anthropic: Claude Opus 4.5 (batch): yes. MoonshotAI: Kimi K2 0905: yes.