GPT-5.3 Chat vs Grok 4.3
Benchmarks, API Token Pricing, Context Window & Speed Comparison
Related topics (12)
OpenAI 的 GPT-5.3 Chat 与 xAI 的 Grok 4.3 是当前备受关注的两款主力 AI 模型。GPT-5.3 Chat 提供 128K Token 上下文窗口，API 定价为每百万 Token 输入 $0.00 / 输出 $0.00；而 Grok 4.3 提供 1M Token 上下文窗口，定价为每百万 Token 输入 $1.25 / 输出 $2.50。以下为两者的基准测试、延迟与成本全面对比。
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GPT-5.3 Chat
旗舰前沿大模型OpenAI 推出的 GPT-5.3 Chat 是一款面向复杂企业级推理、软件开发与全场景生产工作流的旗舰前沿大模型，具备 128K 上下文窗口、138 Token/秒生成速度与 69/100 综合智能指数（免费开源权重）。
$0.00 / 1M
$0.00 / 1M
128K tokens
77%
Grok 4.3
旗舰前沿大模型xAI 推出的 Grok 4.3 是一款面向复杂企业级推理、软件开发与全场景生产工作流的旗舰前沿大模型，具备 1M 上下文窗口、110 Token/秒生成速度与 71/100 综合智能指数（每百万 Token $1.25 输入 / $2.5 输出）。
$1.25 / 1M
$2.50 / 1M
1M tokens
71.4%
核心差异一览
- 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%).
| Feature | 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 |
各项指标谁更胜一筹？
At-a-glance decision framework权威基准测试得分对比
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.
延迟与响应速度
Time to first token (TTFT) and estimated end-to-end response time for a typical 500-token response.
实时 Token 成本模拟器
Adjust sliders to calculate projected monthly cloud API spending with prompt caching discounts.
GPT-5.3 Chat · Strengths & Key Advantages
- 提供 128K 上下文窗口与最高 16K 输出容量，核心基准表现优异（SWE-bench Verified 77% · GPQA Diamond 78%）
- 高达 138 Token/秒的生成吞吐量，首字延迟 (TTFT) 仅约 1060 毫秒
- 极具竞争力的 API 定价（免费开源权重），原生支持提示词缓存、函数调用与结构化 JSON 输出
Considerations & Trade-offs
- 闭源专有云端模型，不支持下载权重进行离线本地物理隔离部署
- 在超长链路的前沿科研推导任务上，深度略逊于顶配重型旗舰推理模型
Grok 4.3 · Strengths & Key Advantages
- 提供 1M 上下文窗口与最高 66K 输出容量，核心基准表现优异（SWE-bench Verified 71.4% · GPQA Diamond 73.5%）
- 高达 110 Token/秒的生成吞吐量，首字延迟 (TTFT) 仅约 650 毫秒
- 极具竞争力的 API 定价（每百万 Token $1.25 输入 / $2.5 输出），原生支持提示词缓存、函数调用与结构化 JSON 输出
Considerations & Trade-offs
- 闭源专有云端模型，不支持下载权重进行离线本地物理隔离部署
- 在超长链路的前沿科研推导任务上，深度略逊于顶配重型旗舰推理模型
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 |
技术规格参数
Architecture, release timeline, capabilities, and modalities.
| Feature | 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: 常见问题解答 (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.
综合结论
综合来看，GPT-5.3 Chat（适合：面向复杂企业级推理、软件开发与全场景生产工作流的旗舰前沿任务、企业级 RAG 检索增强生成、自动化智能体工作流与高可靠 API 集成。）与 Grok 4.3（适合：面向复杂企业级推理、软件开发与全场景生产工作流的旗舰前沿任务、企业级 RAG 检索增强生成、自动化智能体工作流与高可靠 API 集成。）各具优势：Grok 4.3 在综合智能与编程基准测试中表现更强，GPT-5.3 Chat 拥有更快的 Token 生成速度，而 GPT-5.3 Chat 则在规模化 API 部署中具备更高的成本效益。
常见问题 (FAQ)
在编程和深度推理方面，GPT-5.3 Chat 和 Grok 4.3 哪个更强？+
在综合智能指数与编程基准评测中，Grok 4.3 表现占优。建议结合上方的 SWE-bench Verified 与 GPQA Diamond 跑分根据具体场景选择。
GPT-5.3 Chat 与 Grok 4.3 的 API 价格哪个更便宜？+
GPT-5.3 Chat 的 API 价格为输入 $0.00 / 输出 $0.00（每百万 Token），Grok 4.3 为输入 $1.25 / 输出 $2.50。综合混合成本来看，GPT-5.3 Chat 更具性价比。
哪款模型拥有更大的上下文窗口和更快的响应速度？+
GPT-5.3 Chat 支持 128K Token 上下文窗口，而 Grok 4.3 支持 1M Token。在流式生成速度方面，GPT-5.3 Chat 的吞吐表现更快。
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.
数据来源: OpenAI 与 xAI 官方 API 文档、模型发布说明及独立基准测试报告 (2026)。