Claude Opus 4.8 vs GPT-5.5 Instant
Benchmarks, API Token Pricing, Context Window & Speed Comparison
Related topics (12)
Anthropic 的 Claude Opus 4.8 与 OpenAI 的 GPT-5.5 Instant 是当前备受关注的两款主力 AI 模型。Claude Opus 4.8 提供 1M Token 上下文窗口，API 定价为每百万 Token 输入 $5.00 / 输出 $25.00；而 GPT-5.5 Instant 提供 400K Token 上下文窗口，定价为每百万 Token 输入 $0.75 / 输出 $6.00。以下为两者的基准测试、延迟与成本全面对比。
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Claude Opus 4.8
旗舰前沿大模型Anthropic 推出的 Claude Opus 4.8 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、64 Token/秒生成速度与 67/100 综合智能指数（每百万 Token $5 输入 / $25 输出）。
$5.00 / 1M
$25.00 / 1M
1M tokens
80.8%
GPT-5.5 Instant
轻量级高性价比模型OpenAI 推出的 GPT-5.5 Instant 是一款兼顾极低 API 调用成本与高吞吐效率的轻量级大模型，具备 400K 上下文窗口、168 Token/秒生成速度与 65/100 综合智能指数（每百万 Token $0.75 输入 / $6 输出）。
$0.75 / 1M
$6.00 / 1M
400K tokens
74.5%
核心差异一览
- GPT-5.5 Instant is 4.6x cheaper for API usage (input + output tokens combined).
- Claude Opus 4.8 has a larger context window (1M vs 400K tokens).
- GPT-5.5 Instant is faster at 168 tok/s vs 64 tok/s.
- Claude Opus 4.8 leads on SWE-bench coding (80.8% vs 74.5%).
| Feature | Claude Opus 4.8 | GPT-5.5 Instant |
|---|---|---|
Intelligence Index Composite reasoning & knowledge score (0-100) | 67 | 65 |
Provider | Anthropic | OpenAI |
Input Price Cost per million input tokens | $5.00 / 1M | $0.75 / 1M |
Output Price Cost per million output tokens | $25.00 / 1M | $6.00 / 1M |
Blended Price Weighted 7:2:1 cache:input:output per 1M | $3.85 / 1M | $0.80 / 1M |
Context Window Maximum input + output tokens | 1M tokens~1,500 A4 pages of text | 400K tokens~600 A4 pages of text |
Max Output Tokens Per single request | 128K | 128K |
Throughput Speed Tokens generated per second | 64 tok/s | 168 tok/s |
SWE-bench Verified Real-world software engineering | 80.8% | 74.5% |
GPQA Diamond Graduate-level reasoning | 78.9% | 75% |
Cached Input Price Prompt caching discount per 1M tokens | $0.50 / 1M | $0.07 / 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.
Claude Opus 4.8 · Strengths & Key Advantages
- 提供 1M 上下文窗口与最高 128K 输出容量，核心基准表现优异（SWE-bench Verified 80.8% · GPQA Diamond 78.9%）
- 高达 64 Token/秒的生成吞吐量，首字延迟 (TTFT) 仅约 1650 毫秒
- 极具竞争力的 API 定价（每百万 Token $5 输入 / $25 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
- 在大规模高频调用场景下，建议结合提示词缓存 (Prompt Caching) 与批量 API 以控制成本
GPT-5.5 Instant · Strengths & Key Advantages
- 提供 400K 上下文窗口与最高 128K 输出容量，核心基准表现优异（SWE-bench Verified 74.5% · GPQA Diamond 75%）
- 高达 168 Token/秒的生成吞吐量，首字延迟 (TTFT) 仅约 780 毫秒
- 极具竞争力的 API 定价（每百万 Token $0.75 输入 / $6 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 | Claude Opus 4.8 | GPT-5.5 Instant |
|---|---|---|
Cost per Task Estimated USD to finish one task | $5.49 | $0.95 |
Output Tokens / Task Tokens generated per task | 72K | 52K |
Reasoning Tokens / Task Thinking tokens burned per task | 37K | 26K |
技术规格参数
Architecture, release timeline, capabilities, and modalities.
| Feature | Claude Opus 4.8 | GPT-5.5 Instant |
|---|---|---|
| Official API Model ID (SDK) | claude-opus-4-8-20260501 | gpt-5-5-instant |
| API Protocol | Anthropic Messages API + AWS Bedrock + Vertex AI | OpenAI Responses API & Chat Completions v1 |
| Release Date | 2026-05 | 2026-05 |
| Knowledge Cutoff | March 2026 | December 2025 |
| Architecture | Frontier Hybrid Cognitive Architecture | Low-latency compact reasoning model |
| Parameters | Confidential | Confidential |
| Enterprise Rate Limits (RPM / TPM) | 4,000 – 10,000 RPM (Tier 4 + Priority Tier) · 4,000,000 – 10,000,000 TPM | 10,000 – 30,000 RPM (Tier 5 Enterprise) · 800,000 – 2,000,000 TPM |
| Long-Context Tier (>128K/200K) | Standard rate up to 200K tokens; 2x input/output tier above 200K tokens | Flat rate ($0.75/1M in) across full 400K window |
| Prompt Cache Policy & TTL | $0.5/1M cached read (90% off); 5-min default & 1-hour extended TTL | Automatic prefix caching at $0.075/1M (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 · 100% Strict JSON Schema | Native MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema |
| Web Search Grounding & Sandbox | Native Web Search Citations + Code Execution Tool + MCP Connectors | Native Web Search tool + Hosted Code Interpreter & File Search RAG |
| Official Fine-Tuning Support | Custom Model Tuning via Amazon Bedrock & Prompt Distillation | 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 | Anthropic RSP ASL-2 / ASL-3 Constitutional Safety Evaluated | 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 |
Claude Opus 4.8 vs GPT-5.5 Instant: 常见问题解答 (FAQ)
Which is more intelligent, Claude Opus 4.8 or GPT-5.5 Instant?
Claude Opus 4.8 is more intelligent. It scores 67 compared with 65 on the composite Intelligence Index.
Which model is faster?
GPT-5.5 Instant is faster, generating 168 tokens per second compared with 64 tokens per second.
Which model is cheaper to run?
GPT-5.5 Instant is cheaper at $0.80 per 1M tokens blended, compared with $3.85 (7:2:1 cache:input:output ratio).
Which model has lower latency?
GPT-5.5 Instant has lower latency, with a time to first token of 0.78s compared with 1.65s.
Which model has a larger context window?
Claude Opus 4.8 has a larger context window, supporting 1M tokens compared with 400K tokens.
综合结论
综合来看，Claude Opus 4.8（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 GPT-5.5 Instant（适合：兼顾极低 API 调用成本与高吞吐效率的轻量级任务、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：Claude Opus 4.8 在综合智能与编程基准测试中表现更强，GPT-5.5 Instant 拥有更快的 Token 生成速度，而 GPT-5.5 Instant 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，Claude Opus 4.8 和 GPT-5.5 Instant 哪个更强？+
在综合智能指数与编程基准评测中，Claude Opus 4.8 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。
Claude Opus 4.8 与 GPT-5.5 Instant 的 API 价格哪个更便宜？+
Claude Opus 4.8 的 API 价格为输入 $5.00 / 输出 $25.00（每百万 Token），GPT-5.5 Instant 为输入 $0.75 / 输出 $6.00。综合混合成本来看，GPT-5.5 Instant 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？+
Claude Opus 4.8 支持 1M Token 上下文窗口，而 GPT-5.5 Instant 支持 400K Token。在流式生成速度方面，GPT-5.5 Instant 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.
Related reading
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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: Anthropic 与 OpenAI 官方 API 文档、模型发布说明及独立基准测试报告 (2026)。