Seed 1.8 vs GPT-5.2

This comparison does not currently contain a protocol-matched coding benchmark for both Seed 1.8 and GPT-5.2, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

Only GPT-5.2 has a directly sourced input price: $1.75 per million tokens. Only GPT-5.2 has a directly sourced output price: $14.00 per million tokens.

GPT-5.2 has a sourced context window of 400,000 tokens; Seed 1.8's context window is not reported. A larger limit cannot be determined.

There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.

Both models have the same sourced self-hosting status: unsupported. Seed 1.8 is not marked open weight; GPT-5.2 is not marked open weight.

Seed 1.8 is documented with image input; GPT-5.2 is documented with image input. This reflects supported input modalities, not vision quality.

GPT-5.2 has a sourced maximum output of 128,000 tokens; Seed 1.8's maximum output is not reported. A larger limit cannot be determined.

Seed 1.8: reasoning, tool calling, and image input. GPT-5.2: reasoning, tool calling, and image input. Feature support does not establish relative quality.

Seed 1.8 has 0 sourced provider routes; GPT-5.2 has 2, so GPT-5.2 has broader tracked availability.

There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.