Claude 3.5 Sonnet vs GPT-5.6 Terra
GPT-5.6 Terra leads the LLM Stats Score 49.4 to 19.0. GPT-5.6 Terra is 1.3x cheaper per token.
Anthropic · OpenAI · Updated for 2026
Which is better?
GPT-5.6 Terra leads the overall LLM Stats Score 49.4 to 19.0, ranking #22 overall.
In the 1 individual benchmarks reported for both models, GPT-5.6 Terra wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, GPT-5.6 Terra is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-5.6 Terra also accepts a larger context window (1,050,000 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 3.5 Sonnet
- you want predictable pricing at $3.00/M input and $15.00/M output
Choose GPT-5.6 Terra
- overall performance matters — it scores 49.4 and ranks #22 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- cost matters — it's about 1.3x cheaper per token
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Jul 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
19 reported for Claude 3.5 Sonnet · 45 for GPT-5.6 Terra
Claude 3.5 Sonnet outperforms in 0 benchmarks, while GPT-5.6 Terra is better at 1 benchmark (GPQA).
GPT-5.6 Terra significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 1.5x more expensive than GPT-5.6 Terra ($2.00/1M tokens).
For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 1.3x more expensive than GPT-5.6 Terra ($12.00/1M tokens).
In conclusion, Claude 3.5 Sonnet is more expensive than GPT-5.6 Terra.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-5.6 Terra accepts 1,050,000 input tokens compared to Claude 3.5 Sonnet's 200,000 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while GPT-5.6 Terra is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude 3.5 Sonnet and GPT-5.6 Terra support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3.5 Sonnet
GPT-5.6 Terra
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 3.5 Sonnet was released on 2024-10-22, while GPT-5.6 Terra was released on 2026-07-09.
GPT-5.6 Terra is 21 months newer than Claude 3.5 Sonnet.
Oct 22, 2024
2.0 years ago
Jul 9, 2026
3 months ago
1.7yr newerKnowledge Cutoff
When training data ends
GPT-5.6 Terra has a documented knowledge cutoff of 2026-02-16, while Claude 3.5 Sonnet's cutoff date is not specified.
We can confirm GPT-5.6 Terra's training data extends to 2026-02-16, but cannot make a direct comparison without Claude 3.5 Sonnet's cutoff date.
—
Feb 2026
Provider Availability
Claude 3.5 Sonnet is available from Anthropic, Bedrock, Google. GPT-5.6 Terra is available from OpenAI.
Claude 3.5 Sonnet
GPT-5.6 Terra
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3.5 Sonnet and GPT-5.6 Terra side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3.5 Sonnet vs GPT-5.6 Terra.