OpenAI, proprietary

# GPT-5.3 Codex Spark

> GPT-5.3 Codex Spark by OpenAI, released February 2026. API: $1.75 in / $14 out per M tokens. 128K context. Scores, sources and comparisons.
- Canonical page: https://noometry.com/models/gpt-5-3-codex-spark
- Last updated: 2026-10-10
- Title: GPT-5.3 Codex Spark Benchmarks, Price & Rank (October 2026)

GPT-5.3 Codex Spark is a OpenAI model tracked on Noometry for pricing and specifications. API pricing starts at $1.75 per million input tokens and $14 per million output tokens, with a 128K-token context window.

Last verified October 10, 2026

## Specifications

- **Noometry rank:** Unranked
- **Index score:** Not ranked
- **Evidence:** 0 results
- **Provider:** [OpenAI](https://noometry.com/providers/openai)
- **Released:** February 5, 2026
- **Weights:** Proprietary
- **Reasoning:** Yes
- **Context window:** 128K
- **Max output:** 32K
- **Input price:** $1.75 / M
- **Output price:** $14 / M
- **Blended price:** $4.81 / M
- **Output speed:** Not measured
- **Value:** Not ranked
- **Knowledge cutoff:** August 2025
- **Input:** text, image, pdf

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## Benchmark results

Every published result we track, with its source. Bold rows are the ones used for ranking; where several exist we prefer independent runs over self-reported numbers.

No public benchmark results are tracked for GPT-5.3 Codex Spark yet.

## API pricing by provider

GPT-5.3 Codex Spark API prices
| Route | Input $/M | Output $/M | Cached input $/M | Checked |
| --- | --- | --- | --- | --- |
| [openai](https://platform.openai.com/docs/models) | $1.75 | $14 | $0.17 | 2026-10-10 |

[All OpenAI API prices →](https://noometry.com/llm-pricing/openai) [Estimate your cost →](https://noometry.com/tools/cost-calculator)

## Compare GPT-5.3 Codex Spark

-   [GPT-5.3 Codex Spark vs GPT-6 Astra](https://noometry.com/compare/gpt-5-3-codex-spark-vs-gpt-6-astra)
-   [GPT-5.3 Codex Spark vs Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-gpt-5-3-codex-spark)
-   [GPT-5.3 Codex Spark vs Claude Opus 5.5](https://noometry.com/compare/claude-opus-5-5-vs-gpt-5-3-codex-spark)
-   [GPT-5.3 Codex Spark vs Claude Opus 5](https://noometry.com/compare/claude-opus-5-vs-gpt-5-3-codex-spark)
-   [GPT-5.3 Codex Spark vs Claude Fable 5](https://noometry.com/compare/claude-fable-5-vs-gpt-5-3-codex-spark)
-   [GPT-5.3 Codex Spark vs GPT-6.1 Sol](https://noometry.com/compare/gpt-5-3-codex-spark-vs-gpt-6-1-sol)
-   [GPT-5.3 Codex Spark vs Gemini 3.8 Flash](https://noometry.com/compare/gemini-3-8-flash-vs-gpt-5-3-codex-spark)
-   [GPT-5.3 Codex Spark vs Kimi K3](https://noometry.com/compare/gpt-5-3-codex-spark-vs-kimi-k3)
-   [GPT-5.3 Codex Spark vs Grok 4.6](https://noometry.com/compare/gpt-5-3-codex-spark-vs-grok-4-6)
-   [GPT-5.3 Codex Spark vs Qwen3.8 Max](https://noometry.com/compare/gpt-5-3-codex-spark-vs-qwen3-8-max)
-   [GPT-5.3 Codex Spark vs GLM-5.3](https://noometry.com/compare/glm-5-3-vs-gpt-5-3-codex-spark)
-   [GPT-5.3 Codex Spark vs Muse Spark 1.3](https://noometry.com/compare/gpt-5-3-codex-spark-vs-muse-spark-1-3)
-   [GPT-5.3 Codex Spark vs DeepSeek V4 Pro](https://noometry.com/compare/deepseek-v4-pro-vs-gpt-5-3-codex-spark)
-   [GPT-5.3 Codex Spark vs MiMo-V2.6-Pro](https://noometry.com/compare/gpt-5-3-codex-spark-vs-mimo-v2-6-pro)

## Other OpenAI models

-   [GPT-6 Astra](https://noometry.com/models/gpt-6-astra)70.8
-   [GPT-6.1 Sol](https://noometry.com/models/gpt-6-1-sol)65.6
-   [GPT-5.6 Sol](https://noometry.com/models/gpt-5-6-sol)65.0
-   [GPT-5.5 Pro](https://noometry.com/models/gpt-5-5-pro)64.3
-   [GPT-5.5](https://noometry.com/models/gpt-5-5)63.4
-   [GPT-6 Sol](https://noometry.com/models/gpt-6-sol)61.8
-   [GPT-5.4](https://noometry.com/models/gpt-5-4)59.4
-   [GPT-5.6 Terra](https://noometry.com/models/gpt-5-6-terra)59.2

## Frequently asked questions

### How good is GPT-5.3 Codex Spark?

GPT-5.3 Codex Spark is a OpenAI model tracked on Noometry for pricing and specifications. API pricing starts at $1.75 per million input tokens and $14 per million output tokens, with a 128K-token context window.

### How much does GPT-5.3 Codex Spark cost?

GPT-5.3 Codex Spark costs $1.75 per million input tokens and $14 per million output tokens on OpenAI's own API, with cached input at $0.17.

### What is GPT-5.3 Codex Spark's context window?

GPT-5.3 Codex Spark accepts up to 128K tokens of input and can write up to 32K tokens in one response.

### Is GPT-5.3 Codex Spark open source?

No. GPT-5.3 Codex Spark is proprietary and available only through OpenAI's API and partner platforms.

### Cite this page

Noometry. (2026). GPT-5.3 Codex Spark benchmarks and pricing. Retrieved October 10, 2026, from https://noometry.com/models/gpt-5-3-codex-spark

Quote Noometry with a link back to this page. It is also available in [Markdown](https://noometry.com/md/models/gpt-5-3-codex-spark.md).