Model comparison
Claude Opus 4.7 vs GPT-5.3 Codex
Head-to-head evidence from 16 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
BenchAlign evidence: Claude Opus 4.7 supported; GPT-5.3 Codex supported. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Opus 4.7 and GPT-5.3 Codex share 16 comparable benchmark results. 0 of 8 categories are comparable. 6 results are unique to Claude Opus 4.7; 6 to GPT-5.3 Codex.
Updated July 15, 2026- Shared results
- 16
- Claude Opus 4.7 only
- 6
- GPT-5.3 Codex only
- 6
- Comparable categories
- 0 / 8
Benchmark data for Claude Opus 4.7 and GPT-5.3 Codex is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 16 shared benchmark results across 6 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Claude Opus 4.7 is priced at $5.00 input / $25.00 output per 1M tokens, versus $1.75 input / $14.00 output per 1M tokens for GPT-5.3 Codex. Claude Opus 4.7 has 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 | Claude Opus 4.7 | Δ | GPT-5.3 Codex |
|---|---|---|---|
| Agentic | Claude Opus 4.7Not measured | MarginNo overlap | GPT-5.3 Codex71.4 |
| Coding | Claude Opus 4.7Not measured | MarginNo overlap | GPT-5.3 Codex67.2 |
| Math | Claude Opus 4.738.6 | MarginNo overlap | GPT-5.3 CodexNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Opus 4.7 | GPT-5.3 Codex | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Opus 4.7$5 input / $25 output | GPT-5.3 Codex$1.75 input / $14 output | GPT-5.3 Codex has the lower combined listed price. |
| Generation speedtokens per second | Claude Opus 4.7Not available | GPT-5.3 Codex79 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Opus 4.7Not available | GPT-5.3 Codex88.26 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Opus 4.71M | GPT-5.3 Codex400K | Claude Opus 4.7 lists the larger context window. |
Benchmark Deep Dive
Agentic7 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Result |
|---|---|---|---|
| τ²-bench resultsSource | 74% | 86% | GPT-5.3 Codex leads |
| Gert LabsSource | 65.59% | 57.47% | Claude Opus 4.7 leads |
| ResearchClawBenchSource | 20.7% | — | Not comparable |
| OSWorld 2.0Source | 13.9% | — | Not comparable |
| Terminal-Bench 2.0Source | — | 77.3% | Not comparable |
| OSWorld-VerifiedSource | — | 64.7% | Not comparable |
| JobBenchSource | — | 33.7% | Not comparable |
Coding8 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Result |
|---|---|---|---|
| Vibe Code BenchSource | 71.00% | 61.77% | Claude Opus 4.7 leads |
| React Native EvalsSource | 82.8% | — | Not comparable |
| Terminal-Bench HardSource | 54.5% | 53.0% | Claude Opus 4.7 leads |
| AA-SciCodeSource | 50.1% | 53.2% | GPT-5.3 Codex leads |
| FrontierCodeSource | 38.5% | — | Not comparable |
| SWE-bench VerifiedSource | — | 85% | Not comparable |
| SWE-bench ProSource | — | 56.8% | Not comparable |
| SWE-RebenchSource | — | 58.2% | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 42.7% | 44.3% | GPT-5.3 Codex leads |
| AA-GPQA DiamondSource | 88.5% | 91.5% | GPT-5.3 Codex leads |
| AA-HLESource | 31.2% | 39.9% | GPT-5.3 Codex leads |
| AA-Omniscience IndexSource | 14.2% | 9.9% | Claude Opus 4.7 leads |
| AA-Omniscience AccuracySource | 43.5% | 51.8% | GPT-5.3 Codex leads |
| AA-Omniscience Hallucination RateSource | 51.9% | 86.9% | Claude Opus 4.7 leads |
Math2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Opus 4.7 | GPT-5.3 Codex | Result |
|---|---|---|---|
| AA-IFBenchSource | 43.6% | 75.4% | GPT-5.3 Codex leads |
Frequently Asked Questions (3)
Can I compare Claude Opus 4.7 and GPT-5.3 Codex on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Claude Opus 4.7 and GPT-5.3 Codex today?
Claude Opus 4.7: $5.00 input / $25.00 output per 1M tokens GPT-5.3 Codex: $1.75 input / $14.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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