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GPT-5.3 Codex vs claude-3-5-sonnet
2026 Stored listed rates & illustrative token-cost comparison
claude-3-5-sonnet
Retired
The first-party endpoint is retired. Partner-channel availability is tracked separately. Retirement: 2025-10-28
Replacement reference: claude-sonnet-4-6📌 Executive Summary (TL;DR):GPT-5.3 Codex and claude-3-5-sonnet represent distinct provider offerings. Review the granular token rate and context breakdown below to evaluate total cost of ownership.
Metric
GPT-5.3 Codex (openrouter)
claude-3-5-sonnet (Anthropic)
Input listed rate
$1.75 / 1M Tokens
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Output listed rate
$14.00 / 1M Tokens
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Cached Input rate
$0.18 / 1M Tokens
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Context Window
400K Tokens
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Modality
llm
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