Compare AI models
| Specifications | ||
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality. | — | 314B |
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 128k | 8k |
| Overview | ||
| Company | OpenAI | SpaceXSI |
| Release date | Feb 12 2026 | Nov 3 2023 |
| Access | Closed | Open Weight |
| Model details | View model | View model |
Other comparisons
GPT-5.3-Codex-SparkvsClaude Haiku 5.5Grok‑1vsClaude Haiku 5.5GPT-5.3-Codex-SparkvsGemini 4 ArgonGrok‑1vsGemini 4 ArgonGPT-5.3-Codex-SparkvsMuse Spark OpenGrok‑1vsMuse Spark OpenGPT-5.3-Codex-SparkvsDeepSeek-V4.1-Flash-1017Grok‑1vsDeepSeek-V4.1-Flash-1017GPT-5.3-Codex-SparkvsMistral Large 4Grok‑1vsMistral Large 4GPT-5.3-Codex-SparkvsKimi K3Grok‑1vsKimi K3Frequently asked questions
GPT-5.3-Codex-Spark and Grok‑1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑1 shipped 832 days before GPT-5.3-Codex-Spark, so benchmark comparisons should account for the intervening progress.
Context windows are 128k (GPT-5.3-Codex-Spark) vs 8k (Grok‑1). GPT-5.3-Codex-Spark is closed, while Grok‑1 is open weight.
Direct benchmark comparisons are unavailable — GPT-5.3-Codex-Spark and Grok‑1 don't publish scores on any of the same benchmarks.