Model comparison
GPT-4.1 mini vs GPT-5.3 Codex
Head-to-head evidence from 14 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-4.1 mini #152 (Estimated); GPT-5.3 Codex #26 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-4.1 mini and GPT-5.3 Codex share 14 comparable benchmark results. 1 of 8 categories are comparable. 8 results are unique to GPT-4.1 mini; 7 to GPT-5.3 Codex.
Updated July 22, 2026- Shared results
- 14
- GPT-4.1 mini only
- 8
- GPT-5.3 Codex only
- 7
- Comparable categories
- 1 / 8
Pick GPT-5.3 Codex if you want the stronger benchmark profile. GPT-4.1 mini only becomes the better choice if you want the cheaper token bill or you need the larger 1M context window.
Confidence note. This is a partial-evidence comparison with 14 shared benchmark results across 6 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.3 Codex is clearly ahead on the BenchAlign aggregate, 66.69 to 44.19. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.3 Codex's sharpest advantage is in coding, where it averages 67.2 against 23.6. The single biggest benchmark swing on the page is SWE-bench Verified, 23.6% to 85%.
GPT-5.3 Codex is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $0.40 input / $1.60 output per 1M tokens for GPT-4.1 mini. That is roughly 8.8x on output cost alone. GPT-5.3 Codex is the reasoning model in the pair, while GPT-4.1 mini is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. GPT-4.1 mini gives you the larger context window at 1M, compared with 400K for GPT-5.3 Codex.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-4.1 mini | Δ | GPT-5.3 Codex |
|---|---|---|---|
| Coding | GPT-4.1 mini23.6 | Margin→ 43.6 | GPT-5.3 Codex67.2 |
| Agentic | GPT-4.1 miniNot measured | MarginNo overlap | GPT-5.3 Codex71.4 |
| Knowledge | GPT-4.1 mini64.2 | MarginNo overlap | GPT-5.3 CodexNot measured |
| Math | GPT-4.1 mini4.5 | MarginNo overlap | GPT-5.3 CodexNot measured |
| Inst. Following | GPT-4.1 mini88.5 | MarginNo overlap | GPT-5.3 CodexNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 23.6%B 85%Winner: GPT-5.3 CodexΔ 61.4SWE-bench Verified: GPT-4.1 mini scored 23.6%; GPT-5.3 Codex scored 85%. GPT-5.3 Codex wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-4.1 mini | GPT-5.3 Codex | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-4.1 mini$0.4 input / $1.6 output | GPT-5.3 Codex$1.75 input / $14 output | GPT-4.1 mini has the lower combined listed price. |
| Generation speedtokens per second | GPT-4.1 mini80 tok/s | GPT-5.3 Codex79 tok/s | GPT-4.1 mini has the higher measured throughput. |
| First-answer latencyseconds to first token | GPT-4.1 mini0.76 s | GPT-5.3 Codex88.26 s | GPT-4.1 mini reaches the first token sooner. |
| Context windowmaximum listed tokens | GPT-4.1 mini1M | GPT-5.3 Codex400K | GPT-4.1 mini lists the larger context window. |
Benchmark Deep Dive
Agentic8 benchmarks
| Benchmark | GPT-4.1 mini | GPT-5.3 Codex | Result |
|---|---|---|---|
| AA Agentic IndexSource | 1.7% | — | Not comparable |
| τ²-bench resultsSource | 52.9% | 86% | GPT-5.3 Codex leads |
| GDPval-AASource | 0.1% | — | Not comparable |
| GDPval-AASource | 503 | — | Not comparable |
| Terminal-Bench 2.0Source | — | 77.3% | Not comparable |
| OSWorld-VerifiedSource | — | 64.7% | Not comparable |
| Gert LabsSource | — | 57.47% | Not comparable |
| JobBenchSource | — | 33.7% | Not comparable |
CodingGPT-5.3 Codex wins6 benchmarks
| Benchmark | GPT-4.1 mini | GPT-5.3 Codex | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 23.6% | 85% | GPT-5.3 Codex leads |
| AA Coding IndexSource | 20.2% | — | Not comparable |
| AA-SciCodeSource | 40.4% | 53.2% | GPT-5.3 Codex leads |
| SWE-bench ProSource | — | 56.8% | Not comparable |
| SWE-RebenchSource | — | 58.2% | Not comparable |
| Vibe Code BenchSource | — | 61.77% | Not comparable |
Reasoning2 benchmarks
Knowledge8 benchmarks
| Benchmark | GPT-4.1 mini | GPT-5.3 Codex | Result |
|---|---|---|---|
| MMLUSource | 87.5% | — | Not comparable |
| GPQASource | 64.2% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 14.8% | 44.3% | GPT-5.3 Codex leads |
| AA-GPQA DiamondSource | 66.4% | 91.5% | GPT-5.3 Codex leads |
| AA-HLESource | 4.6% | 39.9% | GPT-5.3 Codex leads |
| AA-Omniscience IndexSource | -50.1% | 9.9% | GPT-5.3 Codex leads |
| AA-Omniscience AccuracySource | 17.5% | 51.8% | GPT-5.3 Codex leads |
| AA-Omniscience Hallucination RateSource | 82.0% | 86.9% | GPT-4.1 mini leads |
Math1 benchmarks
| Benchmark | GPT-4.1 mini | GPT-5.3 Codex | Result |
|---|---|---|---|
| FrontierMath v2 (Tiers 1-3)Source | 4.483% | — | Not comparable |
Multimodal2 benchmarks
Frequently Asked Questions (2)
Which is better, GPT-4.1 mini or GPT-5.3 Codex?
GPT-5.3 Codex is ahead on BenchLM's BenchAlign leaderboard, 66.69 to 44.19. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 23.6% and 85%.
Which is better for coding, GPT-4.1 mini or GPT-5.3 Codex?
GPT-5.3 Codex has the edge for coding in this comparison, averaging 67.2 versus 23.6. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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