Claude Haiku 4.5 vs Claude Sonnet 5

Claude Haiku 4.5 (Anthropic) versus Claude Sonnet 5 (Anthropic): API pricing, context window, capabilities and uptime, from the same data as each model page, at the KumoAPI default channel price. Input costs 1 Credits / M for Claude Haiku 4.5 and 2 Credits / M for Claude Sonnet 5, so Claude Haiku 4.5 is 50% cheaper. Context windows are 200K and 1M.

Claude Haiku 4.5claude-haiku-4-5-20251001
Anthropic
Input (prompt)
1Credits / M
Output (completion)
5Credits / M
200K context · 64K output
Claude Haiku 4.5 details
Claude Sonnet 5claude-sonnet-5
Anthropic
Input (prompt)
2Credits / M
Output (completion)
10Credits / M
1M context · 128K output
Claude Sonnet 5 details
Lower input price
Claude Haiku 4.5
50% cheaper
Larger context
Claude Sonnet 5
200K · 1M

Specs side by side

Item
Claude Haiku 4.5claude-haiku-4-5-20251001
Claude Sonnet 5claude-sonnet-5
Input (prompt) · Credits / M12
Output (completion) · Credits / M510
Cache read · Credits / M0.10.2
Context window200K1M
Max output64K128K
7-day uptime——
Latest probe latency——
Measured throughput——
ProtocolsAnthropic MessagesAnthropic Messages
Sample monthly cost (10M in + 2M out)2040

Prices are the KumoAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from KumoAPI probes; a dash means the model is not probed yet.

Capabilities

CapabilityClaude Haiku 4.5Claude Sonnet 5
Vision
Function Calling
Reasoning
Prompt Caching
Streaming
Response Schema
Audio
Video
File Input
Web Search
Realtime
Session
Media
Multipart Form
Binary Response

FAQ

Which is cheaper, Claude Haiku 4.5 or Claude Sonnet 5?

At the KumoAPI default channel price, Claude Haiku 4.5 input costs 1 Credits / M and Claude Sonnet 5 input costs 2 Credits / M, so Claude Haiku 4.5 is 50% cheaper. Output and cache prices are in the specs table above.

Which has the larger context window, Claude Haiku 4.5 or Claude Sonnet 5?

Claude Haiku 4.5 offers 200K tokens, Claude Sonnet 5 offers 1M tokens.

Can I switch between Claude Haiku 4.5 and Claude Sonnet 5 at any time?

Yes. KumoAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.

How do the capabilities of Claude Haiku 4.5 and Claude Sonnet 5 differ?

Their capability flags are identical. Every other capability is either supported by both or by neither; see the capability table above.

More comparisons

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One API key for both Claude Haiku 4.5 and Claude Sonnet 5

Free credits on sign-up, pay as you go, no monthly fee.

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