GPT-5.6 Terra wins on price ($2 vs $5/1M input). GPT-5.5 wins on coding (96 vs 94). For most workflows, GPT-5.6 Terra is the stronger default — best openai value — near-flagship capability at 60% off.
The shortest way to see the safest default, the lower-cost option, and the specialist pick before you read deeper.
GPT-5.6 Terra is the safest overall answer here when you want the strongest default instead of the lowest list price.
Mistral: Mistral Nemo is the lower-cost option to start with when you still need useful output at scale.
GPT-5.5 is the better pick when response speed matters more than maximum reasoning depth.
GPT-5.5 leads on coding with a score of 96 vs 94 for GPT-5.6 Terra.
GPT-5.6 Terra has the larger context window: 1.05M vs 1M for GPT-5.5.
GPT-5.6 Terra is cheaper at $2/1M input tokens vs $5/1M for GPT-5.5.
Choose GPT-5.6 Terra for coding and writing — high-volume production and enterprise workloads.
Choose GPT-5.5 when agentic coding.
Both models serve different primary workflows — consider using each where it has a clear edge.
Switch the scoring lens to see whether the top answer changes when you care more about cost, speed, or long-document work.
OpenAI / Balanced / Aug 6, 2026
Best OpenAI value — near-flagship capability at 60% off.
Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.
You need Sol-level computer use or Opus 5-level repo engineering.
The fastest way to see where the recommendation shifts when your priority changes.
Best OpenAI value — near-flagship capability at 60% off.
Best OpenAI flagship for agentic coding, research, and computer-use work.
Within 1–4 points of Sol on core benchmarks (SWE-bench Pro 63.4%, Terminal-Bench 2.1 87.4%, GPQA Diamond 92.9%) at $2/$12
Strong long-context recall: 72.5% on 512K–1M tasks vs Luna's 41.3% collapse
July 30, 2026 price cut made it ~2x cheaper than GPT-5.5 for comparable capability
Big gap to Sol on computer use (OSWorld 50.2% vs 62.6%) — not a drop-in Sol replacement for agents
Well behind Claude Opus 5 on repository-level coding (SWE-bench Pro ~63% vs 79.2%)
UseRightAI recommendations are based on practical decision factors people actually feel in day-to-day use.
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GPT-5.6 Terra wins on more categories — coding, writing, research. GPT-5.5 is the better pick when agentic coding. The right choice depends on your specific use case.
GPT-5.6 Terra is cheaper at $2/1M input and $12/1M output. GPT-5.5 costs $5/1M input and $30/1M output.
GPT-5.6 Terra has the larger context window at 1.05M tokens vs GPT-5.5's 1M. For large document analysis, GPT-5.6 Terra is the stronger pick.
GPT-5.5 is better for coding with a score of 96 vs GPT-5.6 Terra's 94 (out of 100). Claude Fable 5 is the overall coding leader in this directory at 100/100.
Both GPT-5.6 Terra and GPT-5.5 have similar speed profiles — rated balanced.