Claude Opus 5.5 vs TTS-1 HD
Comparing Claude Opus 5.5 and TTS-1 HD across benchmarks, pricing, and capabilities.
Anthropic · OpenAI · Updated for 2026
Which is better?
Claude Opus 5.5 and TTS-1 HD trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
Claude Opus 5.5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Opus 5.5
- you process long inputs — it offers a 1,000,000 token context window
Choose TTS-1 HD
- you are already invested in the OpenAI ecosystem
At a glance
The differences that matter most.
Individual benchmarks
31 reported for Claude Opus 5.5 · 0 for TTS-1 HD
Claude Opus 5.5 and TTS-1 HDdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Opus 5.5 ($4.00/1M tokens) is 1875000.0x cheaper than TTS-1 HD ($7500000.00/1M tokens).
In conclusion, TTS-1 HD is more expensive than Claude Opus 5.5.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Opus 5.5 accepts 1,000,000 input tokens compared to TTS-1 HD's 1,024 tokens. Only Claude Opus 5.5 specifies output context (128,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Claude Opus 5.5 and TTS-1 HD support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Opus 5.5
TTS-1 HD
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude Opus 5.5 was released on 2026-09-22, while TTS-1 HD's release date is not specified.
We can confirm Claude Opus 5.5's release timeline, but cannot make a direct age comparison without TTS-1 HD's release date.
Sep 22, 2026
0 days ago
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Knowledge Cutoff
When training data ends
Claude Opus 5.5 has a documented knowledge cutoff of 2026-06-01, while TTS-1 HD's cutoff date is not specified.
We can confirm Claude Opus 5.5's training data extends to 2026-06-01, but cannot make a direct comparison without TTS-1 HD's cutoff date.
Jun 2026
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Provider Availability
Claude Opus 5.5 is available from Anthropic. TTS-1 HD is available from OpenAI.
Claude Opus 5.5
TTS-1 HD
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Opus 5.5 and TTS-1 HD side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Opus 5.5 vs TTS-1 HD.