GPT-5.3 Chat vs GPT-5.2 Pro
Benchmarks, API Token Pricing, Context Window & Speed Comparison
Related topics (12)
GPT-5.3 Chat by OpenAI and GPT-5.2 Pro by OpenAI represent two of the frontier AI models analyzed in our comprehensive 2026 AI benchmark and LLM comparison. In this head-to-head evaluation, we examine API token pricing, context window specifications, inference speed (tokens per second), and empirical reasoning performance. From a pure economic perspective, GPT-5.3 Chat holds a notable pricing advantage for token ingestion. On output generation, GPT-5.3 Chat is more economical per million generated tokens. In data-heavy architectures requiring extensive repository or document analysis, GPT-5.2 Pro provides an expanded memory horizon with 400K tokens. In latency-sensitive production environments, GPT-5.3 Chat leads in tokens-per-second throughput, making it ideal for real-time conversational agents and high-concurrency workflows. Below is the complete empirical head-to-head breakdown across cost, speed, context, and capability matrices.
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GPT-5.3 Chat
Модель глубокого рассужденияGPT-5.3 Chat от OpenAI — передовая модель искусственного интеллекта с контекстным окном 128K токенов и стоимостью API $0/1M входящих и $0/1M исходящих токенов для программирования, аналитики и автоматизации.
$0.00 / 1M
$0.00 / 1M
128K tokens
77%
GPT-5.2 Pro
Модель глубокого рассужденияGPT-5.2 Pro от OpenAI — передовая модель искусственного интеллекта с контекстным окном 400K токенов и стоимостью API $17.5/1M входящих и $140/1M исходящих токенов для программирования, аналитики и автоматизации.
$17.50 / 1M
$140.00 / 1M
400K tokens
79.4%
Ключевые отличия кратко
- GPT-5.3 Chat is 1.0x cheaper for API usage (input + output tokens combined).
- GPT-5.2 Pro has a larger context window (400K vs 128K tokens).
- GPT-5.3 Chat is faster at 138 tok/s vs 50 tok/s.
- GPT-5.2 Pro leads on SWE-bench coding (79.4% vs 77.0%).
| Feature | GPT-5.3 Chat | GPT-5.2 Pro |
|---|---|---|
Intelligence Index Composite reasoning & knowledge score (0-100) | 69 | 69 |
Provider | OpenAI | OpenAI |
Input Price Cost per million input tokens | $0.00 / 1M | $17.50 / 1M |
Output Price Cost per million output tokens | $0.00 / 1M | $140.00 / 1M |
Blended Price Weighted 7:2:1 cache:input:output per 1M | $0.00 / 1M | $18.73 / 1M |
Context Window Maximum input + output tokens | 128K tokens~192 A4 pages of text | 400K tokens~600 A4 pages of text |
Max Output Tokens Per single request | 16K | 128K |
Throughput Speed Tokens generated per second | 138 tok/s | 50 tok/s |
SWE-bench Verified Real-world software engineering | 77% | 79.4% |
GPQA Diamond Graduate-level reasoning | 78% | 79% |
Cached Input Price Prompt caching discount per 1M tokens | $0.00 / 1M | $1.75 / 1M |
Кто лидирует в каждой категории?
At-a-glance decision frameworkРезультаты проверенных бенчмарков
Official evaluation metrics verified by independent third-party research labs.
Industry benchmark evaluating real-world GitHub issue resolution and multi-file debugging.
Challenging questions created by domain experts to test complex PhD-level reasoning.
Hardened reasoning and academic knowledge benchmark with reduced lucky-guess probability.
Crowdsourced human preference evaluation based on blind, head-to-head model battles.
Extremely difficult, closed-ended questions spanning the frontier of human expert knowledge.
Autonomous multi-step tasks executed inside a real command-line terminal environment.
Research-grade coding problems drawn from real scientific and numerical workloads.
Contamination-free competitive programming problems collected continuously over time.
American Invitational Mathematics Examination — multi-step Olympiad-level reasoning.
Accuracy when reasoning over very large inputs that fill the model context window.
Tokens emitted per second during active generation streaming.
Задержка и скорость ответа
Time to first token (TTFT) and estimated end-to-end response time for a typical 500-token response.
Интерактивный калькулятор стоимости токенов
Adjust sliders to calculate projected monthly cloud API spending with prompt caching discounts.
GPT-5.3 Chat · Strengths & Key Advantages
- Современная архитектура Chat-tuned unified reasoning model от OpenAI с поддержкой до 128K токенов контекста
- Оптимальная стоимость использования ($0/1M вход, $0/1M выход) и высокая скорость генерации
- Высокие результаты в задачах написания кода, логического мышления и многоязычной обработки
Considerations & Trade-offs
- При работе с максимальным контекстом требуется контроль расхода токенов
- Для узкоспециализированных задач рекомендуется точная настройка системных промптов
GPT-5.2 Pro · Strengths & Key Advantages
- Современная архитектура Maximum-compute unified reasoning model от OpenAI с поддержкой до 400K токенов контекста
- Оптимальная стоимость использования ($17.5/1M вход, $140/1M выход) и высокая скорость генерации
- Высокие результаты в задачах написания кода, логического мышления и многоязычной обработки
Considerations & Trade-offs
- При работе с максимальным контекстом требуется контроль расхода токенов
- Для узкоспециализированных задач рекомендуется точная настройка системных промптов
Token Use & Task Economics
Estimated cost and token consumption to complete one representative agentic task.
| Metric | GPT-5.3 Chat | GPT-5.2 Pro |
|---|---|---|
Cost per Task Estimated USD to finish one task | $2.20 | $23.24 |
Output Tokens / Task Tokens generated per task | 56K | 70K |
Reasoning Tokens / Task Thinking tokens burned per task | 31K | 46K |
Технические характеристики
Architecture, release timeline, capabilities, and modalities.
| Feature | GPT-5.3 Chat | GPT-5.2 Pro |
|---|---|---|
| Official API Model ID (SDK) | gpt-5-3-chat | gpt-5-2-pro |
| API Protocol | OpenAI Responses API & Chat Completions v1 | OpenAI Responses API & Chat Completions v1 |
| Release Date | 2026-03 | 2025-12 |
| Knowledge Cutoff | November 2025 | August 2025 |
| Architecture | Chat-tuned unified reasoning model | Maximum-compute unified reasoning model |
| Parameters | Confidential | Confidential |
| Enterprise Rate Limits (RPM / TPM) | 10,000 – 30,000 RPM (Tier 5 Enterprise) · 800,000 – 2,000,000 TPM | 10,000 – 30,000 RPM (Tier 5 Enterprise) · 800,000 – 2,000,000 TPM |
| Long-Context Tier (>128K/200K) | Free across full context window (only KV-cache VRAM scales) | Flat rate ($17.5/1M in) across full 400K window |
| Prompt Cache Policy & TTL | Automatic prefix KV-caching in vLLM / SGLang (0 cost) | Automatic prefix caching at $1.75/1M (no extra cache-write fee) |
| Computer Use / GUI Agent | Supported (Screen coordinate grounding, browser & desktop GUI action loops) | Supported (Screen coordinate grounding, browser & desktop GUI action loops) |
| 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 | Native Web Search tool + Hosted Code Interpreter & File Search RAG |
| Official Fine-Tuning Support | Supervised Fine-Tuning (SFT), Direct Preference (DPO) & Reinforcement Fine-Tuning (RFT) | Supervised Fine-Tuning (SFT), Direct Preference (DPO) & Reinforcement Fine-Tuning (RFT) |
| 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 | OpenAI Preparedness Framework Audited & System Card Published |
| 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 GPT-5.2 Pro: Быстрые ответы (FAQ)
Which model is faster?
GPT-5.3 Chat is faster, generating 138 tokens per second compared with 50 tokens per second.
Which model is cheaper to run?
GPT-5.3 Chat is cheaper at $0.00 per 1M tokens blended, compared with $18.73 (7:2:1 cache:input:output ratio).
Which model has lower latency?
GPT-5.3 Chat has lower latency, with a time to first token of 1.06s compared with 4.40s.
Which model has a larger context window?
GPT-5.2 Pro has a larger context window, supporting 400K tokens compared with 128K tokens.
Вердикт
Verdict & Model Selection Recommendation: Choose GPT-5.3 Chat if your priority is Conversational and writing work in ChatGPT. Its performance in demanding tasks justifies its operational token cost. Choose GPT-5.2 Pro if your workflow prioritizes Critical analysis, security review and high-value decisions. For large-scale batch processing or customer-facing conversational interfaces, its balance of speed and economics delivers superior ROI.
Часто задаваемые вопросы (FAQ)
How does GPT-5.3 Chat compare to GPT-5.2 Pro in API token pricing and cost per token?+
GPT-5.3 Chat costs $0.00 per 1M input tokens and $0.00 per 1M output tokens, whereas GPT-5.2 Pro costs $17.50 input and $140.00 output. Overall, GPT-5.3 Chat is the more cost-effective model for high-volume API pipelines. Both models support prompt caching discounts of up to 90% for repeated prompt prefixes.
Which model has a larger context window: GPT-5.3 Chat or GPT-5.2 Pro?+
GPT-5.3 Chat supports a context window of 128K tokens (~96k words), while GPT-5.2 Pro supports 400K tokens (~300k words). Therefore, GPT-5.2 Pro can process more textual data and document context in a single prompt.
Which AI model is better for software engineering and coding: GPT-5.3 Chat or GPT-5.2 Pro?+
GPT-5.3 Chat scores 77% on SWE-bench Verified while GPT-5.2 Pro scores 79.4%. For autonomous software engineering and multi-file debugging, GPT-5.2 Pro holds the verified benchmark lead.
What is the difference in reasoning capability and extended thinking between GPT-5.3 Chat and GPT-5.2 Pro?+
GPT-5.3 Chat features native chain-of-thought extended thinking mode with configurable reasoning effort. In contrast, GPT-5.2 Pro provides chain-of-thought reasoning depth for complex math and science.
How does inference speed (tokens per second) compare between GPT-5.3 Chat and GPT-5.2 Pro?+
GPT-5.3 Chat generates approximately 138 tokens per second, while GPT-5.2 Pro delivers 50 tokens per second. In latency-sensitive production environments, GPT-5.3 Chat provides faster time-to-first-token (TTFT) and higher streaming response velocity.
Can you implement a tiered LLM routing setup combining GPT-5.3 Chat and GPT-5.2 Pro to optimize costs?+
Yes! High-efficiency architectures route high-frequency routine classification and conversational tasks to GPT-5.3 Chat to save operational costs, and dynamically escalate complex architectural queries or reasoning tasks to GPT-5.2 Pro. This tiered routing pattern cuts overall API bills by up to 70%.
Understand key metrics like context window, token pricing, reasoning mode, and SWE-bench scores in our comprehensive AI glossary.
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Benchmark scores, token prices, and rate limits evolve rapidly as AI labs release model updates. Always verify current specifications and pricing on the official provider documentation.
Официальные источники: GetInfoUs Independent AI Benchmarks & Official API Specs