Head-to-Head Model Comparison

GPT-5.1 Codex Max vs Claude Sonnet 5.5

Benchmarks, API Token Pricing, Context Window & Speed Comparison

Revisado por el equipo de investigación de GetInfoUsÚltima revisión: October 2026Política editorial
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AI CompareAI BenchmarkToken PricingModel CostModel SpecsSWE-bench CodingModel VersusWhich AI ModelLLM Speed & LatencyReasoning ModelsExtended ThinkingPrompt Caching ROI
GPT-5.1 Codex Max vs Claude Sonnet 5.5: Benchmarks, Pricing & Speed Comparison

GPT-5.1 Codex Max de OpenAI y Claude Sonnet 5.5 de Anthropic compiten directamente en el ecosistema actual de IA. GPT-5.1 Codex Max ofrece una ventana de contexto de 400K tokens a $1.75/$14.00 por millón de tokens (entrada/salida), mientras que Claude Sonnet 5.5 ofrece 1M tokens de contexto a $2.00/$10.00 por millón de tokens. Analizamos sus benchmarks, latencia y costos reales.

Comparación Directa (VS)

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OpenAI

GPT-5.1 Codex Max

Modelo Insignia de Frontera

GPT-5.1 Codex Max de OpenAI es un modelo de IA diseñado para razonamiento empresarial de frontera, programación avanzada y flujos de producción, con ventana de contexto de 400K, velocidad de 95 tokens/s, índice de inteligencia de 62/100 y t

Intelligence Index62 / 100
Input Token:

$1.75 / 1M

Output Token:

$14.00 / 1M

Context Window:

400K tokens

SWE-bench Verified:

78.2%

Anthropic

Claude Sonnet 5.5

Modelo Insignia de Frontera

Claude Sonnet 5.5 de Anthropic 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 105 tokens/s, índice de inteligencia de 78/100 y

Intelligence Index78 / 100
Input Token:

$2.00 / 1M

Output Token:

$10.00 / 1M

Context Window:

1M tokens

SWE-bench Verified:

82.9%

Diferencias Clave de un Vistazo

  • Claude Sonnet 5.5 is 1.3x cheaper for API usage (input + output tokens combined).
  • Claude Sonnet 5.5 has a larger context window (1M vs 400K tokens).
  • Claude Sonnet 5.5 is faster at 105 tok/s vs 95 tok/s.
  • Claude Sonnet 5.5 leads on SWE-bench coding (82.9% vs 78.2%).
Need definitions for token pricing, context, or benchmarks?Explore AI Glossary →
CaracterísticaGPT-5.1 Codex MaxClaude Sonnet 5.5
Intelligence Index
Composite reasoning & knowledge score (0-100)
6278
Provider
OpenAIAnthropic
Input Price
Cost per million input tokens
$1.75 / 1M$2.00 / 1M
Output Price
Cost per million output tokens
$14.00 / 1M$10.00 / 1M
Blended Price
Weighted 7:2:1 cache:input:output per 1M
$1.87 / 1M$1.54 / 1M
Context Window
Maximum input + output tokens
400K tokens~600 A4 pages of text1M tokens~1,500 A4 pages of text
Max Output Tokens
Per single request
128K128K
Throughput Speed
Tokens generated per second
95 tok/s105 tok/s
SWE-bench Verified
Real-world software engineering
78.2%82.9%
GPQA Diamond
Graduate-level reasoning
80%79.4%
Cached Input Price
Prompt caching discount per 1M tokens
$0.17 / 1M$0.20 / 1M

¿Quién gana en cada área?

At-a-glance decision framework
Código
Claude Sonnet 5.5
+4.7% SWE-bench lead
Costo
Claude Sonnet 5.5
1.3x cheaper monthly runtime
Velocidad
Claude Sonnet 5.5
+11% faster generation
Contexto
Claude Sonnet 5.5
1M tokens window

Puntuaciones de Benchmarks Verificadas

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

GPT-5.1 Codex MaxClaude Sonnet 5.5
SWE-bench Verified (Autonomous Coding)

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

78.2%vs82.9%
GPQA Diamond (Doctorate-Level Science & Math)

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

80%vs79.4%
MMLU-Pro (Multi-task Language Understanding)

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

87.2%vs90.1%
LMSYS Chatbot Arena Elo

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

1378ptsvs1490pts
Humanity's Last Exam (Frontier Expert Knowledge)

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

13.2%vsN/A
Terminal-Bench (Agentic Coding & Terminal Use)

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

54.5%vs58.9%
SciCode (Scientific Computing)

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

48.5%vsN/A
LiveCodeBench (Competitive Coding)

Contamination-free competitive programming problems collected continuously over time.

75.5%vsN/A
AIME (Advanced Math Competition)

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

92.6%vsN/A
Long-Context Reasoning

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

80%vsN/A
Generation Speed (Throughput)

Tokens emitted per second during active generation streaming.

95 tok/s vs105 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-5.1 Codex Max1.70s
Claude Sonnet 5.50.55s
Est. End-to-End Response (500 tokens)TTFT + generation time
GPT-5.1 Codex Max6.96s
Claude Sonnet 5.55.31s

Simulador Interactivo de Costos de Tokens

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

100K / day
10K500K1M
30K / day
5K150K300K
50% cached
0% (Cold)50%90% (Warm)
GPT-5.1 Codex Max Monthly API Bill
$15.49 / month
$1.75/1M in · $14/1M out
Claude Sonnet 5.5 Monthly API Bill
$12.30 / month
$2/1M in · $10/1M out
Claude Sonnet 5.5 saves approximately $3.19 / month (21%) under this workload.1.3x Savings

GPT-5.1 Codex Max · Strengths & Key Advantages

  • Ventana de contexto de 400K con hasta 128K tokens de salida máxima (SWE-bench Verified 78.2% · GPQA Diamond 80%)
  • Rendimiento ágil de 95 tokens/segundo con latencia inicial (TTFT) de solo 1700 ms
  • Economía de API competitiva ($1.75/$14 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

Claude Sonnet 5.5 · Strengths & Key Advantages

  • Ventana de contexto de 1M con hasta 128K tokens de salida máxima (SWE-bench Verified 82.9% · GPQA Diamond 79.4%)
  • Rendimiento ágil de 105 tokens/segundo con latencia inicial (TTFT) de solo 550 ms
  • Economía de API competitiva ($2/$10 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 volúmenes masivos de tokens, se recomienda activar el caché de prompts y Batch API para optimizar costos

Token Use & Task Economics

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

MetricGPT-5.1 Codex MaxClaude Sonnet 5.5
Cost per Task
Estimated USD to finish one task
$2.40$3.29
Output Tokens / Task
Tokens generated per task
62K72K
Reasoning Tokens / Task
Thinking tokens burned per task
36K37K

Especificaciones Técnicas

Architecture, release timeline, capabilities, and modalities.

CaracterísticaGPT-5.1 Codex MaxClaude Sonnet 5.5
Official API Model ID (SDK)gpt-5-1-codex-maxclaude-sonnet-5-5-20260901
API ProtocolOpenAI Responses API & Chat Completions v1Anthropic Messages API + AWS Bedrock + Vertex AI
Release Date2025-112026-09
Knowledge CutoffOctober 2024June 2026
ArchitectureMaximum-capability code-specialised reasoning modelAdaptive Frontier Multimodal Transformer
ParametersConfidentialConfidential
Enterprise Rate Limits (RPM / TPM)10,000 – 30,000 RPM (Tier 5 Enterprise) · 800,000 – 2,000,000 TPM4,000 – 10,000 RPM (Tier 4 + Priority Tier) · 4,000,000 – 10,000,000 TPM
Long-Context Tier (>128K/200K)Flat rate ($1.75/1M in) across full 400K windowStandard rate up to 200K tokens; 2x input/output tier above 200K tokens
Prompt Cache Policy & TTLAutomatic prefix caching at $0.175/1M (no extra cache-write fee)$0.2/1M cached read (90% off); 5-min default & 1-hour extended TTL
Computer Use / GUI AgentSupported (Screen coordinate grounding, browser & desktop GUI action loops)Supported (Screen coordinate grounding, browser & desktop GUI action loops)
MCP & Parallel Tool CallingNative MCP Client/Server ready · Parallel function calling · 100% Strict JSON SchemaNative MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema
Web Search Grounding & SandboxNative Web Search tool + Hosted Code Interpreter & File Search RAGNative Web Search Citations + Code Execution Tool + MCP Connectors
Official Fine-Tuning SupportSupervised Fine-Tuning (SFT), Direct Preference (DPO) & Reinforcement Fine-Tuning (RFT)Custom Model Tuning via Amazon Bedrock & Prompt Distillation
Multimodal Token BillingText 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 VRAMCloud-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 ClassificationOpenAI Preparedness Framework Audited & System Card PublishedAnthropic RSP ASL-2 / ASL-3 Constitutional Safety Evaluated
Enterprise Compliance (ZDR/HIPAA/SOC2)SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise TierSOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier
Input Modalitiestext, visiontext, vision
Output Modalitiestexttext

GPT-5.1 Codex Max vs Claude Sonnet 5.5: Respuestas Rápidas (FAQ)

Which is more intelligent, GPT-5.1 Codex Max or Claude Sonnet 5.5?

Claude Sonnet 5.5 is more intelligent. It scores 78 compared with 62 on the composite Intelligence Index.

Which model is faster?

Claude Sonnet 5.5 is faster, generating 105 tokens per second compared with 95 tokens per second.

Which model is cheaper to run?

Claude Sonnet 5.5 is cheaper at $1.54 per 1M tokens blended, compared with $1.87 (7:2:1 cache:input:output ratio).

Which model has lower latency?

Claude Sonnet 5.5 has lower latency, with a time to first token of 0.55s compared with 1.70s.

Which model has a larger context window?

Claude Sonnet 5.5 has a larger context window, supporting 1M tokens compared with 400K tokens.

Veredicto

Tanto GPT-5.1 Codex Max (Ideal para razonamiento empresarial de frontera, programación avanzada y flujos de producción, sistemas RAG empresariales y automatización mediante API.) como Claude Sonnet 5.5 (Ideal para razonamiento empresarial de frontera, programación avanzada y flujos de producción, sistemas RAG empresariales y automatización mediante API.) destacan en producción: Claude Sonnet 5.5 lidera en inteligencia general y programación, Claude Sonnet 5.5 ofrece mayor velocidad de generación de tokens y Claude Sonnet 5.5 resulta más rentable para cargas de trabajo API de alto volumen.

Preguntas frecuentes

¿Cuál es mejor para programación y razonamiento, GPT-5.1 Codex Max o Claude Sonnet 5.5?+

En las pruebas de inteligencia compuesta y resolución de código, Claude Sonnet 5.5 obtiene la ventaja. Puedes revisar la tabla SWE-bench y GPQA arriba para comparar cada métrica.

¿Cuánto cuesta la API de GPT-5.1 Codex Max frente a Claude Sonnet 5.5?+

GPT-5.1 Codex Max cuesta $1.75 / $14.00 por millón de tokens de entrada/salida, mientras que Claude Sonnet 5.5 cuesta $2.00 / $10.00. En costo combinado, Claude Sonnet 5.5 es la opción más económica.

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

GPT-5.1 Codex Max cuenta con 400K tokens de contexto frente a 1M tokens de Claude Sonnet 5.5. En velocidad de inferencia, Claude Sonnet 5.5 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.

Las puntuaciones de benchmarks, precios por token y límites de tasa evolucionan rápidamente. Verifique siempre las especificaciones actuales en la documentación oficial del proveedor.

Fuentes: Documentación oficial de API de OpenAI y Anthropic, tarjetas de sistema y benchmarks independientes (2026).