Claude Opus 4.5 vs OpenAI GPT Latest, API pricing and model comparison

Compare Claude Opus 4.5 vs OpenAI GPT Latest 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 Opus 4.5 vs OpenAI GPT Latest in one matrix. Current records: Claude Opus 4.5 on OpenRouter: $5/$25 per 1M tokens, 200K context window; OpenAI GPT Latest on OpenRouter: $5/$30 per 1M tokens, 1050K context window. Prices are estimates—verify official provider pages before production use.

Claude Opus 4.5

anthropic/claude-opus-4.5

OpenRouter

Input: $5.00 / 1M
Output: $25.00 / 1M
Context: 200k
Model page: Details

GPT Latest

~openai/gpt-latest

OpenRouter

Input: $5.00 / 1M
Output: $30.00 / 1M
Context: 1.1m
Model page: Details

Comparison matrixLLM Table

Models to compare2/4

Model 1

200K

Select model344 models

Model 2

1.1M

Select model344 models

Anthropic: Claude Opus 4.5

OpenRouter

Cheapest (this scenario)

Input

$5.00 / 1M

Output

$25.00 / 1M

Context

200K

Monthly cost

$1,250.00

Benchmark

1,473Top benchmarkLMArena Text Arena

VisionToolsJSONReasoningLong context

OpenAI GPT Latest

OpenRouter

Input

$5.00 / 1M

Output

$30.00 / 1M

Context

1.1MLargest context

Monthly cost

$1,400.00

Benchmark

—

VisionToolsJSONReasoningLong context

Anthropic: Claude Opus 4.5

OpenRouter

OpenAI GPT Latest

OpenRouter

Input

$5.00 / 1MCheapest (this scenario)

Output

$25.00 / 1MCheapest (this scenario)

$30.00 / 1M

Context

200K

1.1MLargest context

Benchmark

1,473Top benchmark

LMArena Text Arena

—

Monthly cost

$1,250.00Cheapest (this scenario)

$1,400.00

Capabilities

VisionToolsJSONReasoningLong context

FAQ

Model comparison notes

How do Claude Opus 4.5 vs OpenAI GPT Latest 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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