OpenAIGPT-5.3 Codex Spark
GPT-5.3 Codex Spark is an OpenAI proprietary reasoning model, released 5 Feb 2026. It is not yet ranked: no independent benchmark results so far, only pricing and metadata. At $4.81 per million tokens blended it is among the most expensive ranked models.
- Blended price
- $4.81/M
- $1.75 in · $14.00 out
- Output speed
- –
- First answer
- –
- Context
- 128k
- Full answer
- –
- Cost per run
- –
- Released
- 5 Feb 2026
No independent quality benchmark results yet — only pricing and metadata.
What a task costs
Estimates from list price, output speed and time to first answer for the best configuration. “With caching” assumes three-quarters of the input is served from the prompt cache at $0.175 per 1M. Reasoning tokens are not modelled.
| Workload | Tokens in / out | Cost | With caching | Time |
|---|---|---|---|---|
| Chat reply | 400 / 300 | $0.0049 | $0.0044 | – |
| Summarize a 30-page report | 12,000 / 600 | $0.029 | $0.015 | – |
| Code edit | 6,000 / 1,500 | $0.032 | $0.024 | – |
| Agentic coding session | 60,000 / 4,000 | $0.161 | $0.090 | – |
| Structured extraction | 2,000 / 200 | $0.0063 | $0.0039 | – |
More from OpenAI
See also
Questions people ask
- Why does GPT-5.3 Codex Spark have no BenchLeader Index score?
- The index needs at least five independent results across at least two categories; as of 25 Oct 2026 GPT-5.3 Codex Spark has 0 that count. Launch-post scores are never used, so it is ranked once independent publishers have measured it.
- How much does GPT-5.3 Codex Spark cost per 1M tokens?
- As of 25 Oct 2026, GPT-5.3 Codex Spark costs $1.75 per 1M input tokens and $14.00 per 1M output tokens, $4.81 blended (three input tokens per output token).
- When was GPT-5.3 Codex Spark released?
- OpenAI released GPT-5.3 Codex Spark on 5 Feb 2026.
Data as of 25 Oct 2026. Compare with another model.
Cite as: BenchLeader, “GPT-5.3 Codex Spark: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/gpt-5-3-codex-spark.