# GPT-5.2-Codex vs Inkling

> Side-by-side benchmark comparison for GPT-5.2-Codex and Inkling across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-2-codex-vs-inkling
- Last updated: October 17, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-5.2-Codex and Inkling share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Inkling has the lower published output-token price.
- Inkling has the larger published context window at 1M.

## Model Snapshot

| Property | GPT-5.2-Codex | Inkling |
|----------|----------|----------|
| Creator | OpenAI | Thinking Machines Lab |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Hybrid |
| Context | 400K | 1M |
| Independent public score (not head-to-head) | 55.3 | 52.6 |
| Benchmarks Covered | 5 | 24 |
| Pricing (input/output) | $1.75 / $14.00 | $1.87 / $4.68 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-5.2-Codex public-lane score: 40.8 (Estimated · #64/128)
- Inkling public-lane score: 37.2 (Supported · #74/128)

| Benchmark | GPT-5.2-Codex | Inkling | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 51.79% | Coming soon | Coming soon |
| JobBench | 26.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| BrowseComp | Coming soon | 77.1% | Coming soon |
| MCP Atlas | Coming soon | 74.1% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 47.6% | Coming soon |
| CWE-bench v1 | Coming soon | 37.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-5.2-Codex public-lane score: 43.7 (Supported · #56/150)
- Inkling public-lane score: 33.9 (Supported · #82/150)

| Benchmark | GPT-5.2-Codex | Inkling | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 37.91% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 88.0% | 85.5% | GPT-5.2-Codex |
| SWE-bench (Vals) | 72.4% | 77.6% | Inkling |
| SWE-bench Verified | Coming soon | 77.6% | Coming soon |
| SWE-bench Pro | Coming soon | 54.3% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| FrontierSWE v2 | Coming soon | 4.1% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-5.2-Codex public-lane score: 82.4 (Unranked · 2 rankable rows)
- Inkling public-lane score: 79 (#14/28)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-5.2-Codex public-lane score: 76.9 (Unranked · 1 rankable row)
- Inkling public-lane score: 67.5 (#35/54)

| Benchmark | GPT-5.2-Codex | Inkling | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 73.5% | Coming soon |
| CharXiv | Coming soon | 82% | Coming soon |
| CharXiv w/o tools | Coming soon | 78.1% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-5.2-Codex public-lane score: 56.4 (Estimated · #54/184)
- Inkling public-lane score: 54.6 (Supported · #63/184)

| Benchmark | GPT-5.2-Codex | Inkling | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87.9% | Coming soon |
| GPQA-D | Coming soon | 87.9% | Coming soon |
| HLE | Coming soon | 46% | Coming soon |
| HLE w/o tools | Coming soon | 30% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 87.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GPT-5.2-Codex public-lane score: 93.8 (#4/148)
- Inkling public-lane score: 87.6 (#36/148)

| Benchmark | GPT-5.2-Codex | Inkling | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.8% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-5.2-Codex public-lane score: Coming soon
- Inkling public-lane score: 58.3 (#11/12)

| Benchmark | GPT-5.2-Codex | Inkling | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 97.1% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 33.333% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 4.878% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-5.2-Codex and Inkling?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [GPT-5.2-Codex vs Inkling-Small](/compare/gpt-5-2-codex-vs-inkling-small)
- [Inkling vs Inkling-Small](/compare/inkling-vs-inkling-small)
- [GPT-5.2-Codex vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gpt-5-2-codex)
- [Inkling vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-inkling)

## Explore More

- [GPT-5.2-Codex profile](/models/gpt-5-2-codex)
- [Inkling profile](/models/inkling)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)