Models & Pricing

GPT-6.1 Terra vs GPT-5.6 Terra

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ComparisonGPT-6.1 Terra
gpt-6.1-terra
GPT-5.6 Terra
gpt-5.6-terra
TypeChatChat
Best forVisual reasoning, document analysis and clear writingChat, writing, coding and reasoning tasks
TokenRex price$0.70 in / $3.50 out per 1M tokens$1.40 in / $8.40 out per 1M tokens
Cached input / 1M tokens$0.035 per 1M tokens$0.14 per 1M tokens
Cache write / 1M tokens$0.875 per 1M tokensNo extra fee
Cached outputNot offered · standard output rate appliesNot offered · standard output rate applies
Web search$7.00 per 1K searches$7.00 per 1K searches
Market price$1.00 in / $5.00 out per 1M tokens$2.00 in / $12.00 out per 1M tokens
Context window (provider)1,050,000 tokens1,050,000 tokens
Input token limit (provider)Within the context windowWithin the context window
Maximum output128,000 tokens128,000 tokens
Knowledge cutoffJune 1, 2026Feb 16, 2026
Vendor input modalitiesText, ImageNot verified
Vendor output modalitiesTextNot verified
TokenRex endpointsPOST /v1/chat/completions · POST /v1/responsesPOST /v1/chat/completions · POST /v1/responses
TokenRex inputText, ImageText, Image/PDF content through the chat bridge
TokenRex outputTextText
ThinkingLow, Medium, High, Extra high and Max; Max requires Responses. Native none is also accepted.—
ResponsesStreaming, function tools, strict JSON and built-in web search verified with direct requests.—
FastPriority serving verified as service_tier fast; 2× standard token rates. Bill the tier actually served.—
Benchmarks
Benchmark evidence—2 source-linked results
FrontierCode v1.1 (Extended)—
47.66%

Cognition FrontierCode 1.1; GPT-5.6 Terra; medium effort; codex harness; Extended subset (150 tasks). Published weighted rubric score (new_score × 100), not the all-or-nothing pass rate; solution-source violations score zero. Source field new_score=0.4766. Publisher evaluation, not a TokenRex measurement; provider effort configuration is not a guarantee of the API's fixed thinking budget.

Cognition · FrontierCode 1.1 original leaderboard
FrontierCode v1.1 (Main)—
33.88%

Cognition FrontierCode 1.1; GPT-5.6 Terra; medium effort; codex harness; Main subset (100 tasks). Published weighted rubric score (new_score × 100), not the all-or-nothing pass rate; solution-source violations score zero. Source field new_score=0.3388. Publisher evaluation, not a TokenRex measurement; provider effort configuration is not a guarantee of the API's fixed thinking budget.

Cognition · FrontierCode 1.1 original leaderboard

No overall score, winner or cost-versus-score frontier is calculated without comparable, attributable benchmark evidence. Different test configurations appear separately. Vendor capabilities are distinct from TokenRex API support.

— means no published value or no matching capability. Provider token limits are not tested gateway guarantees; TokenRex media controls and response formats are listed separately.

GPT-6.1 Terra

Sources and verification

Provider specifications describe the upstream model, not a guarantee of every feature through TokenRex. Prices come from the enabled catalog; benchmark results belong to the exact tested model.

Research notes (5)
  • Official Standard rates per 1M tokens: $1 input, $5 output, $0.05 cached input, $1.25 cache write (30 minutes); current TokenRex offer applies to these rates.
  • Above 272,000 input tokens, the entire request uses 2× input/cache rates and 1.5× output rates. Fast adds its 2× token multiplier.
  • 12-hour cache writes cost $2.50 per 1M tokens before offer and long-context multipliers; use prompt_cache_options.ttl=12h on Responses. Cached output is not offered.
  • Official launch material mentions benchmark comparisons, but no exact-version numeric scores were verified during this review. Benchmark gaps are left empty; no other model scores are inherited.
  • Maximum-capacity inputs and outputs, repeated cache hits and hosted computer-use execution were not independently tested.

GPT-5.6 Terra

Sources and verification

Provider specifications describe the upstream model, not a guarantee of every feature through TokenRex. Prices come from the enabled catalog; benchmark results belong to the exact tested model.

Research notes (1)
  • Published provider limits; maximum-capacity requests have not been independently exercised through TokenRex. Thinking-level variants use the same provider model; reasoning and answer tokens share the output budget.

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