Compare AI models
| Specifications | ||
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. | 32k | 128k |
| Overview | ||
| Company | OpenAI | |
| Release date | Feb 8 2024 | Feb 12 2026 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
Gemini 1.0 UltravsClaude Haiku 5.5GPT-5.3-Codex-SparkvsClaude Haiku 5.5Gemini 1.0 UltravsMuse Spark OpenGPT-5.3-Codex-SparkvsMuse Spark OpenGemini 1.0 UltravsGrok 4.7GPT-5.3-Codex-SparkvsGrok 4.7Gemini 1.0 UltravsDeepSeek-V4.1-Flash-1017GPT-5.3-Codex-SparkvsDeepSeek-V4.1-Flash-1017Gemini 1.0 UltravsMistral Large 4GPT-5.3-Codex-SparkvsMistral Large 4Gemini 1.0 UltravsKimi K3GPT-5.3-Codex-SparkvsKimi K3Frequently asked questions
Gemini 1.0 Ultra and GPT-5.3-Codex-Spark don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.0 Ultra shipped 735 days before GPT-5.3-Codex-Spark, so benchmark comparisons should account for the intervening progress.
Context windows are 32k (Gemini 1.0 Ultra) vs 128k (GPT-5.3-Codex-Spark).
Direct benchmark comparisons are unavailable — Gemini 1.0 Ultra and GPT-5.3-Codex-Spark don't publish scores on any of the same benchmarks.