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Claude Sonnet 4.5 vs Seed 1.5-VL
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 is available on 3 providers. Both models have their strengths depending on your specific coding needs.
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Anthropic
Claude Sonnet 4.5, released by Anthropic in September 2025, is a large language model from the Claude 4.5 family that balances response quality and efficiency for coding, agentic tasks, and analytical work. It features a 200K token context window (extendable to 1M tokens in beta), 64K maximum output tokens, native image understanding, and extended thinking support. Sonnet 4.5 targets use cases that require a balance of throughput and reasoning depth, including code generation, data analysis, and multi-step agentic pipelines.
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ByteDance
Seed1.5-VL, released by ByteDance Seed on May 15, 2025, is a vision-language foundation model composed of a 532M-parameter vision encoder and a Mixture-of-Experts language model with 20 billion active parameters. It was pretrained on over 3 trillion multimodal tokens and achieved state-of-the-art performance on 38 out of 60 public VLM benchmarks at release. Seed1.5-VL targets complex visual reasoning, OCR, video comprehension, 3D spatial understanding, and multimodal agentic tasks.
4 months newer
Seed 1.5-VL
ByteDance
2025-05-15
Claude Sonnet 4.5
Anthropic
2025-09-29
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Sonnet 4.5
Average Score:-1.0%
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Seed 1.5-VL
Average Score:67.6%(+68.6%)
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Sonnet 4.5
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Seed 1.5-VL
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Claude Sonnet 4.5
Avg Score:-1.0%
Providers:3
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Seed 1.5-VL
Avg Score:67.6%(+68.6%)
Providers:0