Claude Sonnet 4.6 vs Gemini 2.5 Pro vs GPT-5.3-Codex, API pricing and model comparison

Compare Claude Sonnet 4.6 vs Gemini 2.5 Pro vs GPT-5.3-Codex 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 Sonnet 4.6 vs Gemini 2.5 Pro vs GPT-5.3-Codex in one matrix. Current records: Claude Sonnet 4.6 on Claude API: $3/$15 per 1M tokens, 1000K context window; Gemini 2.5 Pro on Gemini API: $1.25/$10 per 1M tokens, 1049K context window; GPT-5.3-Codex on OpenRouter: $1.75/$14 per 1M tokens, 400K context window. Prices are estimates—verify official provider pages before production use.

Claude Sonnet 4.6

claude-sonnet-4-6

Claude API

Input: $3.00 / 1M
Output: $15.00 / 1M
Context: 1m
Model page: Details

Gemini 2.5 Pro

gemini-2.5-pro

Gemini API

Input: $1.25 / 1M
Output: $10.00 / 1M
Context: 1.0m
Model page: Details

GPT-5.3-Codex

openai/gpt-5.3-codex

OpenRouter

Input: $1.75 / 1M
Output: $14.00 / 1M
Context: 400k
Model page: Details

Comparison matrixLLM Table

Models to compare3/4

Model 1

Select model344 models

Model 2

1.0M

Select model344 models

Model 3

400K

Select model344 models

Anthropic: Claude Sonnet 4.6

Claude API

Input

$3.00 / 1M

Output

$15.00 / 1M

Context

Monthly cost

$750.00

Benchmark

1,470Top benchmarkLMArena Text Arena

VisionToolsReasoningLong context

Google: Gemini 2.5 Pro

Gemini API

Cheapest (this scenario)

Input

$1.25 / 1M

Output

$10.00 / 1M

Context

1.0MLargest context

Monthly cost

$425.00

Benchmark

1,446LMArena Text Arena

VisionToolsJSONReasoningAudioLong context

OpenAI: GPT-5.3-Codex

OpenRouter

Input

$1.75 / 1M

Output

$14.00 / 1M

Context

400K

Monthly cost

$595.00

Benchmark

1,407LMArena WebDev Arena

VisionToolsJSONReasoningLong context

Anthropic: Claude Sonnet 4.6

Claude API

Google: Gemini 2.5 Pro

Gemini API

OpenAI: GPT-5.3-Codex

OpenRouter

Input

$3.00 / 1M

$1.25 / 1MCheapest (this scenario)

$1.75 / 1M

Output

$15.00 / 1M

$10.00 / 1MCheapest (this scenario)

$14.00 / 1M

Context

1.0MLargest context

400K

Benchmark

1,470Top benchmark

LMArena Text Arena

1,446

LMArena Text Arena

1,407

LMArena WebDev Arena

Monthly cost

$750.00

$425.00Cheapest (this scenario)

$595.00

Capabilities

VisionToolsReasoningLong context

VisionToolsJSONReasoningAudioLong context

VisionToolsJSONReasoningLong context

FAQ

Model comparison notes

How do Claude Sonnet 4.6 vs Gemini 2.5 Pro vs GPT-5.3-Codex 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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