Head-to-Head Model Comparison

GPT-5.3 Chat vs Grok 4.3

Benchmarks, API Token Pricing, Context Window & Speed Comparison

Revisado por el equipo de investigación de GetInfoUsÚltima revisión: October 2026Política editorial

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GPT-5.3 ChatProfile

Grok 4.3Profile

Multi-Model Arena Stack:

5-Model Matrix Workbench

Popular Matchups:

OpenAI

GPT-5.3 Chat

Modelo Insignia de Frontera

GPT-5.3 Chat de OpenAI es un modelo de IA diseñado para razonamiento empresarial de frontera, programación avanzada y flujos de producción, con ventana de contexto de 128K, velocidad de 138 tokens/s, índice de inteligencia de 69/100 y tarif

Intelligence Index69 / 100

Input Token:

$0.00 / 1M

Output Token:

$0.00 / 1M

Context Window:

128K tokens

SWE-bench Verified:

77%

xAI

Grok 4.3

Modelo Insignia de Frontera

Grok 4.3 de xAI es un modelo de IA diseñado para razonamiento empresarial de frontera, programación avanzada y flujos de producción, con ventana de contexto de 1M, velocidad de 110 tokens/s, índice de inteligencia de 71/100 y tarifa de $1.2

Intelligence Index71 / 100

Input Token:

$1.25 / 1M

Output Token:

$2.50 / 1M

Context Window:

1M tokens

SWE-bench Verified:

71.4%

Diferencias Clave de un Vistazo

GPT-5.3 Chat is 1.0x cheaper for API usage (input + output tokens combined).
Grok 4.3 has a larger context window (1M vs 128K tokens).
GPT-5.3 Chat is faster at 138 tok/s vs 110 tok/s.
GPT-5.3 Chat leads on SWE-bench coding (77.0% vs 71.4%).

Need definitions for token pricing, context, or benchmarks?Explore AI Glossary →

Característica	GPT-5.3 Chat	Grok 4.3
Intelligence Index Composite reasoning & knowledge score (0-100)	69	71
Provider	OpenAI	xAI
Input Price Cost per million input tokens	$0.00 / 1M	$1.25 / 1M
Output Price Cost per million output tokens	$0.00 / 1M	$2.50 / 1M
Blended Price Weighted 7:2:1 cache:input:output per 1M	$0.00 / 1M	$0.72 / 1M
Context Window Maximum input + output tokens	128K tokens~192 A4 pages of text	1M tokens~1,500 A4 pages of text
Max Output Tokens Per single request	16K	66K
Throughput Speed Tokens generated per second	138 tok/s	110 tok/s
SWE-bench Verified Real-world software engineering	77%	71.4%
GPQA Diamond Graduate-level reasoning	78%	73.5%
Cached Input Price Prompt caching discount per 1M tokens	$0.00 / 1M	$0.31 / 1M

¿Quién gana en cada área?

At-a-glance decision framework

Código

GPT-5.3 Chat

+5.6% SWE-bench lead

Costo

GPT-5.3 Chat

1.0x cheaper monthly runtime

Velocidad

GPT-5.3 Chat

+25% faster generation

Contexto

Grok 4.3

1M tokens window

Puntuaciones de Benchmarks Verificadas

Official evaluation metrics verified by independent third-party research labs.

GPT-5.3 ChatGrok 4.3

SWE-bench Verified (Autonomous Coding)

Industry benchmark evaluating real-world GitHub issue resolution and multi-file debugging.

77%vs71.4%

GPQA Diamond (Doctorate-Level Science & Math)

Challenging questions created by domain experts to test complex PhD-level reasoning.

78%vs73.5%

MMLU-Pro (Multi-task Language Understanding)

Hardened reasoning and academic knowledge benchmark with reduced lucky-guess probability.

88%vs85.2%

LMSYS Chatbot Arena Elo

Crowdsourced human preference evaluation based on blind, head-to-head model battles.

1416ptsvs1410pts

Humanity's Last Exam (Frontier Expert Knowledge)

Extremely difficult, closed-ended questions spanning the frontier of human expert knowledge.

14.4%vs12.8%

Terminal-Bench (Agentic Coding & Terminal Use)

Autonomous multi-step tasks executed inside a real command-line terminal environment.

52.5%vs47%

SciCode (Scientific Computing)

Research-grade coding problems drawn from real scientific and numerical workloads.

48%vs44.5%

LiveCodeBench (Competitive Coding)

Contamination-free competitive programming problems collected continuously over time.

76%vs71.2%

AIME (Advanced Math Competition)

American Invitational Mathematics Examination — multi-step Olympiad-level reasoning.

93.6%vs85%

Long-Context Reasoning

Accuracy when reasoning over very large inputs that fill the model context window.

83%vs88.5%

Generation Speed (Throughput)

Tokens emitted per second during active generation streaming.

138 tok/s vs110 tok/s

Latencia y Tiempo de Respuesta

Time to first token (TTFT) and estimated end-to-end response time for a typical 500-token response.

Time to First Token (TTFT)Lower is better

GPT-5.3 Chat1.06s

Grok 4.30.65s

Est. End-to-End Response (500 tokens)TTFT + generation time

GPT-5.3 Chat4.68s

Grok 4.35.20s

Simulador Interactivo de Costos de Tokens

Adjust sliders to calculate projected monthly cloud API spending with prompt caching discounts.

Daily Input Tokens100K / day

10K500K1M

Daily Output Tokens30K / day

5K150K300K

Prompt Cache Hit Ratio50% cached

0% (Cold)50%90% (Warm)

GPT-5.3 Chat Monthly API Bill

$0.00 / month

$0/1M in · $0/1M out

Grok 4.3 Monthly API Bill

$4.59 / month

$1.25/1M in · $2.5/1M out

GPT-5.3 Chat saves approximately $4.59 / month (100%) under this workload.1.0x Savings

GPT-5.3 Chat · Strengths & Key Advantages

Ventana de contexto de 128K con hasta 16K tokens de salida máxima (SWE-bench Verified 77% · GPQA Diamond 78%)
Rendimiento ágil de 138 tokens/segundo con latencia inicial (TTFT) de solo 1060 ms
Economía de API competitiva (acceso gratuito de pesos abiertos) con soporte para caché de prompts y salidas JSON estructuradas

Considerations & Trade-offs

Modelo propietario en la nube; no permite descargar los pesos para ejecución local sin conexión
En demostraciones científicas extremas, los modelos de razonamiento pesado de gama alta ofrecen mayor profundidad

Grok 4.3 · Strengths & Key Advantages

Ventana de contexto de 1M con hasta 66K tokens de salida máxima (SWE-bench Verified 71.4% · GPQA Diamond 73.5%)
Rendimiento ágil de 110 tokens/segundo con latencia inicial (TTFT) de solo 650 ms
Economía de API competitiva ($1.25/$2.5 por 1M de tokens) con soporte para caché de prompts y salidas JSON estructuradas

Considerations & Trade-offs

Modelo propietario en la nube; no permite descargar los pesos para ejecución local sin conexión
En demostraciones científicas extremas, los modelos de razonamiento pesado de gama alta ofrecen mayor profundidad

Token Use & Task Economics

Estimated cost and token consumption to complete one representative agentic task.

Metric	GPT-5.3 Chat	Grok 4.3
Cost per Task Estimated USD to finish one task	$2.20	$1.35
Output Tokens / Task Tokens generated per task	56K	46K
Reasoning Tokens / Task Thinking tokens burned per task	31K	22K

Especificaciones Técnicas

Architecture, release timeline, capabilities, and modalities.

Característica	GPT-5.3 Chat	Grok 4.3
Official API Model ID (SDK)	gpt-5-3-chat	grok-4-3-latest
API Protocol	OpenAI Responses API & Chat Completions v1	xAI REST API (OpenAI-Compatible)
Release Date	2026-03	2026-04
Knowledge Cutoff	November 2025	January 2026
Architecture	Chat-tuned unified reasoning model	Colossus-Scale Mixture-of-Experts
Parameters	Confidential	Confidential
Enterprise Rate Limits (RPM / TPM)	10,000 – 30,000 RPM (Tier 5 Enterprise) · 800,000 – 2,000,000 TPM	5,000 – 15,000 RPM (Production Tier) · 4,000,000 – 10,000,000 TPM
Long-Context Tier (>128K/200K)	Free across full context window (only KV-cache VRAM scales)	Flat rate ($1.25/1M in) across full 1000K window
Prompt Cache Policy & TTL	Automatic prefix KV-caching in vLLM / SGLang (0 cost)	Cached input at $0.31/1M tokens
Computer Use / GUI Agent	Supported (Screen coordinate grounding, browser & desktop GUI action loops)	API / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)
MCP & Parallel Tool Calling	Native MCP Client/Server ready · Parallel function calling	Native MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema
Web Search Grounding & Sandbox	Native Web Search tool + Hosted Code Interpreter & File Search RAG	Real-time Web & X (Twitter) Search Grounding + Code Execution
Official Fine-Tuning Support	Supervised Fine-Tuning (SFT), Direct Preference (DPO) & Reinforcement Fine-Tuning (RFT)	API Prompt Engineering & RAG Distillation
Multimodal Token Billing	Text BPE (~4 chars/token) · Vision (~258–765 tokens per image tile)	Text BPE (~4 chars/token) · Vision (~258–765 tokens per image tile)
Quantization & Min GPU VRAM	Cloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster) · Zero Local VRAM Required (100% Serverless Cloud API)	Cloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster) · Zero Local VRAM Required (100% Serverless Cloud API)
Safety & Frontier Classification	OpenAI Preparedness Framework Audited & System Card Published	xAI Production Safety & Alignment Verified
Enterprise Compliance (ZDR/HIPAA/SOC2)	SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier	SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier
Input Modalities	text, vision	text, vision
Output Modalities	text	text

GPT-5.3 Chat vs Grok 4.3: Respuestas Rápidas (FAQ)

Which is more intelligent, GPT-5.3 Chat or Grok 4.3?

Grok 4.3 is more intelligent. It scores 71 compared with 69 on the composite Intelligence Index.

Which model is faster?

GPT-5.3 Chat is faster, generating 138 tokens per second compared with 110 tokens per second.

Which model is cheaper to run?

GPT-5.3 Chat is cheaper at $0.00 per 1M tokens blended, compared with $0.72 (7:2:1 cache:input:output ratio).

Which model has lower latency?

Grok 4.3 has lower latency, with a time to first token of 0.65s compared with 1.06s.

Which model has a larger context window?

Grok 4.3 has a larger context window, supporting 1M tokens compared with 128K tokens.

Veredicto

Tanto GPT-5.3 Chat (Ideal para razonamiento empresarial de frontera, programación avanzada y flujos de producción, sistemas RAG empresariales y automatización mediante API.) como Grok 4.3 (Ideal para razonamiento empresarial de frontera, programación avanzada y flujos de producción, sistemas RAG empresariales y automatización mediante API.) destacan en producción: Grok 4.3 lidera en inteligencia general y programación, GPT-5.3 Chat ofrece mayor velocidad de generación de tokens y GPT-5.3 Chat resulta más rentable para cargas de trabajo API de alto volumen.

Preguntas frecuentes

¿Cuál es mejor para programación y razonamiento, GPT-5.3 Chat o Grok 4.3?+

En las pruebas de inteligencia compuesta y resolución de código, Grok 4.3 obtiene la ventaja. Puedes revisar la tabla SWE-bench y GPQA arriba para comparar cada métrica.

¿Cuánto cuesta la API de GPT-5.3 Chat frente a Grok 4.3?+

GPT-5.3 Chat cuesta $0.00 / $0.00 por millón de tokens de entrada/salida, mientras que Grok 4.3 cuesta $1.25 / $2.50. En costo combinado, GPT-5.3 Chat es la opción más económica.

¿Qué modelo tiene mayor ventana de contexto y menor latencia?+

GPT-5.3 Chat cuenta con 128K tokens de contexto frente a 1M tokens de Grok 4.3. En velocidad de inferencia, GPT-5.3 Chat ofrece un rendimiento superior.

AI Terminology & Guide

Explore Glossary →

Understand key metrics like context window, token pricing, reasoning mode, and SWE-bench scores in our comprehensive AI glossary.

Tokens & Pricing Context Window AI Benchmarks Reasoning Models Tool Calling Model Context Protocol (MCP)

GPT-5.3 Chat vs Grok 4.3

Cambia y Compara Cualquier Modelo

GPT-5.3 Chat

Grok 4.3

¿Quién gana en cada área?

Puntuaciones de Benchmarks Verificadas

Latencia y Tiempo de Respuesta

Simulador Interactivo de Costos de Tokens

GPT-5.3 Chat · Strengths & Key Advantages

Considerations & Trade-offs

Grok 4.3 · Strengths & Key Advantages

Considerations & Trade-offs

Token Use & Task Economics

Especificaciones Técnicas

GPT-5.3 Chat vs Grok 4.3: Respuestas Rápidas (FAQ)

Veredicto

Preguntas frecuentes

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