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Comparison of Seed-1.8, Step-5-Preview, OpenAI: GPT-6.1 Sol
3 modelsByteDanceSeed-1.8Remove ×stepfun-aiStep-5-PreviewRemove ×openaiOpenAI: GPT-6.1 SolRemove ×
What’s differentOptimized specifically for multimodal agent scenarios. It features enhanced agent capabilities, upgraded multimodal comprehension, and more flexible context management.600B total and 27B active parameters; accepts images and video, with FP8 and BF16 weights for deployment.Requires Responses API for tools; offers Ultrafast inference with US or EU data residency.
DateFeb 17, 2026ListedSep 18, 2026ReleasedSep 29, 2026Released
Listed rate$0.25 in / $2.00 out/ 1M tokensDeepInfra · all routes ↗$1.00 in / $2.70 out/ 1M tokensDeepInfra · all routes ↗$2.00 in / $10.00 out/ 1M tokensExperiential · all routes ↗Standard list rate
Provider endpoints1 endpoint →6 endpoints →10 endpoints →
AA Intelligence ↗4.3.2Not reported43.73 ↗Effort not specifiedIndependent result51.83 ↗Effort: max · MaxIndependent result
AA-Briefcase ↗1.1Not reported1,424.32 ↗Effort not specifiedIndependent result1,557 ↗Effort: max · MaxIndependent result
GDPval-AA ↗2.1Not reported1,586.63 ↗Effort not specifiedIndependent result1,593.85 ↗Effort: max · MaxIndependent result
AutomationBench-AA ↗AA Index 4.3.2 collectionNot reported50.96% ↗Effort not specifiedIndependent result64.87% ↗Effort: max · MaxIndependent result
Terminal-Bench 4.0 · AA ↗Not reported33.33% ↗Effort not specifiedHarness unreportedIndependent result56.06% ↗Effort: max · MaxHarness unreportedIndependent result
SciCode ↗AA Index 4.3.2 collectionNot reported58.91% ↗AA · Under reviewEffort not specifiedIndependent result54.17% ↗AA · Under reviewEffort: max · MaxIndependent result
Humanity’s Last Exam ↗AA Index 4.3.2 collectionNot reported46.48% ↗Effort not specifiedIndependent result52.92% ↗Effort: max · MaxIndependent result
GDP.pdf ↗AA Index 4.3.2 collectionNot reported14.8% ↗Effort not specifiedIndependent result31% ↗Effort: max · MaxIndependent result
CritPt ↗AA Index 4.3.2 collectionNot reported20.86% ↗AA · Under reviewEffort not specifiedIndependent result31.71% ↗AA · Under reviewEffort: max · MaxIndependent result
AA-Omniscience ↗AA Index 4.3.2 collectionNot reported16.38 ↗Effort not specifiedIndependent result41.53 ↗Effort: max · MaxIndependent result
AA-LCR ↗1.1Not reported88.33% ↗Effort not specifiedIndependent result83% ↗Effort: max · MaxIndependent result
LiveBench ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported62.01% ↗Effort: max · single run · equal mean of 7 suitesIndependent result85.41% ↗Effort: max · single run · equal mean of 7 suitesIndependent result
LiveBench Design ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported76.9% ↗Effort: max · single runIndependent result82.1% ↗Effort: max · single runIndependent result
LiveBench Research ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported72.8% ↗Effort: max · single runIndependent result83.5% ↗Effort: max · single runIndependent result
LiveBench Browser Use ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported24% ↗Effort: max · single runIndependent result88% ↗Effort: max · single runIndependent result
LiveBench Coding ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported85.6% ↗Effort: max · single runIndependent result96% ↗Effort: max · single runIndependent result
LiveBench Agentic ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported27.5% ↗Effort: max · single runIndependent result73% ↗Effort: max · single runIndependent result
LiveBench Data Analysis ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported63.5% ↗Effort: max · single runIndependent result82.7% ↗Effort: max · single runIndependent result
LiveBench Reasoning ↗2.0 · 2026-10-14 (dataset 2026-09-02)Not reported83.8% ↗Effort: max · single runIndependent result92.6% ↗Effort: max · single runIndependent result
Context window256K1M1.1M
Max output—64K128K
Parameters———
Tool callingNot reportedSupportedSupported
Structured outputNot reportedSupportedSupported
Image inputNot reportedSupportedSupported
Video inputNot reportedSupportedNot reported
ReasoningNot reportedSupportedSupported
Prompt cachingNot reportedSupportedSupported
Open weightsNot reportedSupportedNot reported

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