Data points: 69
The readout for Claude Opus 4.6 and GPT-5.3, before the detailed comparison sheet.
Decision read
Claude Opus 4.6
Claude Opus 4.6 currently has the stronger profile, with verified wins split 4 to 2.
Evidence depth
69 data points
Includes 0 benchmark rows, 1 audit samples, and 8 provider examples.
Selection signal
Start with Claude Opus 4.6
The charts below split 9 high-signal samples across speed, scores, and audit health.
Model compare Claude Opus 4.6 vs GPT-5.3claude-opus-4-6-vs-gpt-5-3 | Model A Claude Opus 4.6 | Model B GPT-5.3 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 4 wins | 2 wins |
| Where it leads | Cheapest input price, Free providers, Provider coverage, Recent tests | Average speed, First-token latency |
| Model metadata | Claude Opus 4.6 exposes 1M tokens; notable signals: Text input, Image input, File input, Text output. | GPT-5.3 exposes 128K tokens; notable signals: Text input, Image input, File input, Text output. |
| Developer | Anthropic | OpenAI |
| Context window | 1M tokens | 128K tokens |
| Max output | 128K tokens | 16.4K tokens |
| Released | Apr 2026 | Mar 2026 |
| Modalities | Input TextImageFile Output Text | Input TextImageFile Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-opus-4.6-fast | openai/gpt-5.3-chat |
| References | No data | No data |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
| Metric | Claude Opus 4.6 | GPT-5.3 |
|---|---|---|
| No shared benchmark metrics are available yet. | ||
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.6 | GPT-5.3 |
|---|---|---|
RenRen APIWinner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 78 70728088 | GPT-5.3 gpt-5.3 No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.6 | GPT-5.3 |
|---|---|---|
小水管 API15 tests | Claude Opus 4.6 speed / latency 45 tok/s / 6167ms input / output No data | GPT-5.3 speed / latency 64 tok/s / 2635ms input / output No data |
N1N10 tests | Claude Opus 4.6 speed / latency 46 tok/s / 2559ms input / output No data | GPT-5.3 speed / latency 56 tok/s / 2764ms input / output No data |
CaMeL AI5 tests | Claude Opus 4.6 speed / latency N/A / N/A input / output No data | GPT-5.3 speed / latency 51 tok/s / 2246ms input / output No data |
Cuz AI5 tests | Claude Opus 4.6 speed / latency 43 tok/s / 2285ms input / output No data | GPT-5.3 speed / latency N/A / N/A input / output No data |
EasyMore5 tests | Claude Opus 4.6 speed / latency 27 tok/s / 15402ms input / output No data | GPT-5.3 speed / latency N/A / N/A input / output No data |
Claude Opus 4.6 claude-opus-4.6 speed / latency No data input / output $0/M / $0/M | GPT-5.3 gpt-5.3 speed / latency No data input / output $75.00/M / $600.00/M | |
Claude Opus 4.6 claude-opus-4-6-thinking speed / latency No data input / output $0.205/M / $1.03/M | GPT-5.3 gpt-5.3-chat-latest speed / latency No data input / output $0.072/M / $0.575/M | |
Claude Opus 4.6 claude-4.6-opus speed / latency No data input / output $0.514/M / $4.11/M | GPT-5.3 gpt-5-3 speed / latency No data input / output $0.137/M / $1.10/M |
This report only uses LMSpeed data for Claude Opus 4.6 and GPT-5.3: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Claude Opus 4.6 | GPT-5.3 |
|---|---|---|
| When to choose each model | Claude Opus 4.6 Claude Opus 4.6 is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. | GPT-5.3 GPT-5.3 is stronger when you prioritize Average speed, First-token latency. |
TL;DR: Claude Opus 4.6 leads across 69 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Claude Opus 4.6 vs GPT-5.3 into nearby model comparisons with enough verified LMSpeed data.
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
