Claude 3.5 Haiku vs Claude Opus 4.1, API pricing and model comparison

Compare Claude 3.5 Haiku vs Claude Opus 4.1 side by side by input/output token price, context window, benchmark signals, capabilities, and example monthly API cost.

Quick comparison summary

This page compares Claude 3.5 Haiku vs Claude Opus 4.1 in one matrix. Current records: Claude 3.5 Haiku on OpenRouter: $0.8/$4 per 1M tokens, 200K context window; Claude Opus 4.1 on OpenRouter: $15/$75 per 1M tokens, 200K context window. Prices are estimates—verify official provider pages before production use.

Claude 3.5 Haiku

anthropic/claude-3.5-haiku

OpenRouter

Input: $0.8000 / 1M
Output: $4.00 / 1M
Context: 200k
Model page: Details

Claude Opus 4.1

anthropic/claude-opus-4.1

OpenRouter

Input: $15.00 / 1M
Output: $75.00 / 1M
Context: 200k
Model page: Details

Comparison matrixLLM Table

Models to compare2/4

Model 1

200K

Select model344 models

Model 2

200K

Select model344 models

Anthropic: Claude 3.5 Haiku

OpenRouter

Cheapest (this scenario)

Input

$0.8000 / 1M

Output

$4.00 / 1M

Context

200KLargest context

Monthly cost

$200.00

Benchmark

1,127LMArena Vision Arena

VisionToolsLong context

Anthropic: Claude Opus 4.1

OpenRouter

Input

$15.00 / 1M

Output

$75.00 / 1M

Context

200KLargest context

Monthly cost

$3,750.00

Benchmark

1,449Top benchmarkLMArena Text Arena

VisionToolsJSONReasoningLong context

Anthropic: Claude 3.5 Haiku

OpenRouter

Anthropic: Claude Opus 4.1

OpenRouter

Input

$0.8000 / 1MCheapest (this scenario)

$15.00 / 1M

Output

$4.00 / 1MCheapest (this scenario)

$75.00 / 1M

Context

200KLargest context

Benchmark

1,127

LMArena Vision Arena

1,449Top benchmark

LMArena Text Arena

Monthly cost

$200.00Cheapest (this scenario)

$3,750.00

Capabilities

VisionToolsLong context

VisionToolsJSONReasoningLong context

FAQ

Model comparison notes

How do Claude 3.5 Haiku vs Claude Opus 4.1 API prices compare?

Compare input and output prices per 1M tokens side by side. The same underlying model can list different prices by route (Direct API vs OpenRouter); this table uses the selected route records.

Which model looks cheaper?

Scenario cost depends on your input/output mix. The example monthly cost in the table uses default token volumes—adjust with the cost calculator for your traffic.

Are benchmark scores included?

Independent or provider-reported benchmark signals appear when available. Benchmarks do not replace price analysis—evaluate both for your quality requirements.

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