GPT-Realtime-2.1 vs SeedRealtime
Benchmarks, API Token Pricing, Context Window & Speed Comparison
Related topics (12)
GPT-Realtime-2.1 by OpenAI and SeedRealtime by ByteDance 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, SeedRealtime holds a notable pricing advantage for token ingestion. On output generation, SeedRealtime is more economical per million generated tokens. In data-heavy architectures requiring extensive repository or document analysis, both models provide an identical memory horizon with 128K tokens. In latency-sensitive production environments, SeedRealtime 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-Realtime-2.1
深度推理模型OpenAI 推出的 GPT-Realtime-2.1 人工智能模型，具备 128K 上下文窗口，输入价格为 $32/百万 Token，输出价格为 $64/百万 Token，专为高质量生产环境、推理与自动化工作流打造。
$32.00 / 1M
$64.00 / 1M
128K tokens
62%
SeedRealtime
深度推理模型ByteDance 推出的 SeedRealtime 人工智能模型，具备 128K 上下文窗口，输入价格为 $0.5/百万 Token，输出价格为 $2/百万 Token，专为高质量生产环境、推理与自动化工作流打造。
$0.50 / 1M
$2.00 / 1M
128K tokens
N/A
核心差异一览
- SeedRealtime is 42.1x cheaper for API usage (input + output tokens combined).
- SeedRealtime is faster at 120 tok/s vs 90 tok/s.
| Feature | GPT-Realtime-2.1 | SeedRealtime |
|---|---|---|
Intelligence Index Composite reasoning & knowledge score (0-100) | 65 | 83 |
Provider | OpenAI | ByteDance |
Input Price Cost per million input tokens | $32.00 / 1M | $0.50 / 1M |
Output Price Cost per million output tokens | $64.00 / 1M | $2.00 / 1M |
Blended Price Weighted 7:2:1 cache:input:output per 1M | $15.04 / 1M | $0.34 / 1M |
Context Window Maximum input + output tokens | 128K tokens~192 A4 pages of text | 128K tokens~192 A4 pages of text |
Max Output Tokens Per single request | 33K | 8K |
Throughput Speed Tokens generated per second | 90 tok/s | 120 tok/s |
SWE-bench Verified Real-world software engineering | 62% | N/A |
GPQA Diamond Graduate-level reasoning | 70% | N/A |
Cached Input Price Prompt caching discount per 1M tokens | $3.20 / 1M | $0.05 / 1M |
各项指标谁更胜一筹？
At-a-glance decision frameworkEvaluations ongoing
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-Realtime-2.1 · Strengths & Key Advantages
- 由 OpenAI 研发的高精度 Real-time speech-to-speech multimodal transformer 架构，支持 128K 上下文窗口
- 极具竞争力的 API 定价（输入 $32/1M，输出 $64/1M），支持高速推理与工具调用
- 在代码生成、逻辑推理与多语言处理基准测试中表现出色
Considerations & Trade-offs
- 超长上下文请求需要规划 Token 成本与并发配额
- 针对特定垂直领域任务建议结合系统提示词与检索增强（RAG）以获得最佳效果
SeedRealtime · Strengths & Key Advantages
- 由 ByteDance 研发的高精度 Native Audio-Visual Full-Duplex Transformer 架构，支持 128K 上下文窗口
- 极具竞争力的 API 定价（输入 $0.5/1M，输出 $2/1M），支持高速推理与工具调用
- 在代码生成、逻辑推理与多语言处理基准测试中表现出色
Considerations & Trade-offs
- 超长上下文请求需要规划 Token 成本与并发配额
- 针对特定垂直领域任务建议结合系统提示词与检索增强（RAG）以获得最佳效果
Token Use & Task Economics
Estimated cost and token consumption to complete one representative agentic task.
| Metric | GPT-Realtime-2.1 | SeedRealtime |
|---|---|---|
Cost per Task Estimated USD to finish one task | $6.66 | $0.12 |
Output Tokens / Task Tokens generated per task | 26K | 16K |
Reasoning Tokens / Task Thinking tokens burned per task | 14K | 4K |
技术规格参数
Architecture, release timeline, capabilities, and modalities.
| Feature | GPT-Realtime-2.1 | SeedRealtime |
|---|---|---|
| Official API Model ID (SDK) | gpt-realtime-2-1 | seedrealtime |
| API Protocol | OpenAI Responses API & Chat Completions v1 | ByteDance REST API (OpenAI-Compatible) |
| Release Date | 2026-07 | 2026-08 |
| Knowledge Cutoff | February 2026 | June 2026 |
| Architecture | Real-time speech-to-speech multimodal transformer | Native Audio-Visual Full-Duplex Transformer |
| 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) · 800,000 – 2,000,000 TPM |
| Long-Context Tier (>128K/200K) | Flat rate ($32/1M in) across full 128K window | Flat rate ($0.5/1M in) across full 128K window |
| Prompt Cache Policy & TTL | Automatic prefix caching at $3.2/1M (no extra cache-write fee) | Cached input at $0.05/1M tokens |
| Computer Use / GUI Agent | API / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop) | 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 | Supported via external Tavily/Exa Search & E2B/Docker Sandbox tools |
| 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) · Audio (~25–32 tokens/sec) | Text BPE (~4 chars/token) · Vision (~258–765 tokens per image tile) · Audio (~25–32 tokens/sec) |
| 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 | ByteDance 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 | audio, text | text, vision, audio |
| Output Modalities | audio, text | text, audio |
GPT-Realtime-2.1 vs SeedRealtime: 常见问题解答 (FAQ)
Which is more intelligent, GPT-Realtime-2.1 or SeedRealtime?
SeedRealtime is more intelligent. It scores 83 compared with 65 on the composite Intelligence Index.
Which model is faster?
SeedRealtime is faster, generating 120 tokens per second compared with 90 tokens per second.
Which model is cheaper to run?
SeedRealtime is cheaper at $0.34 per 1M tokens blended, compared with $15.04 (7:2:1 cache:input:output ratio).
Which model has lower latency?
SeedRealtime has lower latency, with a time to first token of 0.28s compared with 0.32s.
综合结论
Verdict & Model Selection Recommendation: Choose GPT-Realtime-2.1 if your priority is Real-time voice agents, call automation and live assistants. Its performance in demanding tasks justifies its operational token cost. Choose SeedRealtime if your workflow prioritizes Real-time conversational avatars, virtual customer service hotlines, and interactive smart glasses. For large-scale batch processing or customer-facing conversational interfaces, its balance of speed and economics delivers superior ROI.
常见问题 (FAQ)
How does GPT-Realtime-2.1 compare to SeedRealtime in API token pricing and cost per token?+
GPT-Realtime-2.1 costs $32.00 per 1M input tokens and $64.00 per 1M output tokens, whereas SeedRealtime costs $0.50 input and $2.00 output. Overall, SeedRealtime 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-Realtime-2.1 or SeedRealtime?+
Both GPT-Realtime-2.1 and SeedRealtime offer an identical context window of 128K tokens (~96k words). Both architectures provide equal capacity for large document ingestion, multi-file codebases, and extended multi-turn conversation histories.
Which AI model is better for software engineering and coding: GPT-Realtime-2.1 or SeedRealtime?+
GPT-Realtime-2.1 scores 62% on SWE-bench Verified, while SeedRealtime scores competitively for software generation. For complex autonomous debugging and agentic engineering, GPT-Realtime-2.1 provides robust code generation and tool calling.
What is the difference in reasoning capability and extended thinking between GPT-Realtime-2.1 and SeedRealtime?+
GPT-Realtime-2.1 features native chain-of-thought extended thinking mode with configurable reasoning effort. In contrast, SeedRealtime provides chain-of-thought reasoning depth for complex math and science.
How does inference speed (tokens per second) compare between GPT-Realtime-2.1 and SeedRealtime?+
GPT-Realtime-2.1 generates approximately 90 tokens per second, while SeedRealtime delivers 120 tokens per second. In latency-sensitive production environments, SeedRealtime provides faster time-to-first-token (TTFT) and higher streaming response velocity.
Can you implement a tiered LLM routing setup combining GPT-Realtime-2.1 and SeedRealtime to optimize costs?+
Yes! High-efficiency architectures route high-frequency routine classification and conversational tasks to SeedRealtime to save operational costs, and dynamically escalate complex architectural queries or reasoning tasks to GPT-Realtime-2.1. 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.
数据来源: GetInfoUs Independent AI Benchmarks & Official API Specs